diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1.meta
index 6d6bbb4ef..e2fef10cd 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: bd178fddcdaeff94aaccd422544b2f34
+guid: 24d2b3d9ccf04504ab7dbf23faccf6d9
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/.signature.p7s b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/.signature.p7s
similarity index 87%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/.signature.p7s
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/.signature.p7s
index 0c80a3a99..f15c997c6 100644
Binary files a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/.signature.p7s and b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/.signature.p7s differ
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/MessagePack.nuspec b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/MessagePack.nuspec
similarity index 81%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/MessagePack.nuspec
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/MessagePack.nuspec
index bc913b7c9..e5f05b664 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/MessagePack.nuspec
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/MessagePack.nuspec
@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2013/05/nuspec.xsd">
   <metadata>
     <id>MessagePack</id>
-    <version>3.1.0</version>
+    <version>3.1.1</version>
     <title>MessagePack for C#</title>
     <authors>neuecc,aarnott</authors>
     <license type="expression">MIT</license>
@@ -11,11 +11,11 @@
     <description>Extremely Fast MessagePack(MsgPack) Serializer for C# (.NET Framework, .NET 6, Unity, Xamarin).</description>
     <copyright>© Yoshifumi Kawai and contributors. All rights reserved.</copyright>
     <tags>MsgPack MessagePack Serialization Formatter Serializer Unity Xamarin</tags>
-    <repository type="git" url="https://github.com/MessagePack-CSharp/MessagePack-CSharp" commit="ff62247ddd554a64889fab9a450c4f4b54ab4c88" />
+    <repository type="git" url="https://github.com/MessagePack-CSharp/MessagePack-CSharp" commit="8373710fb0ae4bb453737f773b930401d8500c31" />
     <dependencies>
       <group targetFramework=".NETFramework4.7.2">
-        <dependency id="MessagePackAnalyzer" version="3.1.0" include="All" />
-        <dependency id="MessagePack.Annotations" version="3.1.0" exclude="Build,Analyzers" />
+        <dependency id="MessagePackAnalyzer" version="3.1.1" include="All" />
+        <dependency id="MessagePack.Annotations" version="3.1.1" exclude="Build,Analyzers" />
         <dependency id="Microsoft.Bcl.AsyncInterfaces" version="8.0.0" exclude="Build,Analyzers" />
         <dependency id="Microsoft.NET.StringTools" version="17.11.4" include="Runtime,Build,Native,ContentFiles,Analyzers,BuildTransitive" />
         <dependency id="System.Collections.Immutable" version="8.0.0" exclude="Build,Analyzers" />
@@ -24,18 +24,18 @@
         <dependency id="System.Threading.Tasks.Extensions" version="4.5.4" exclude="Build,Analyzers" />
       </group>
       <group targetFramework="net8.0">
-        <dependency id="MessagePackAnalyzer" version="3.1.0" include="All" />
-        <dependency id="MessagePack.Annotations" version="3.1.0" exclude="Build,Analyzers" />
+        <dependency id="MessagePackAnalyzer" version="3.1.1" include="All" />
+        <dependency id="MessagePack.Annotations" version="3.1.1" exclude="Build,Analyzers" />
         <dependency id="Microsoft.NET.StringTools" version="17.11.4" include="Runtime,Build,Native,ContentFiles,Analyzers,BuildTransitive" />
       </group>
       <group targetFramework="net9.0">
-        <dependency id="MessagePackAnalyzer" version="3.1.0" include="All" />
-        <dependency id="MessagePack.Annotations" version="3.1.0" exclude="Build,Analyzers" />
+        <dependency id="MessagePackAnalyzer" version="3.1.1" include="All" />
+        <dependency id="MessagePack.Annotations" version="3.1.1" exclude="Build,Analyzers" />
         <dependency id="Microsoft.NET.StringTools" version="17.11.4" include="Runtime,Build,Native,ContentFiles,Analyzers,BuildTransitive" />
       </group>
       <group targetFramework=".NETStandard2.0">
-        <dependency id="MessagePackAnalyzer" version="3.1.0" include="All" />
-        <dependency id="MessagePack.Annotations" version="3.1.0" exclude="Build,Analyzers" />
+        <dependency id="MessagePackAnalyzer" version="3.1.1" include="All" />
+        <dependency id="MessagePack.Annotations" version="3.1.1" exclude="Build,Analyzers" />
         <dependency id="Microsoft.Bcl.AsyncInterfaces" version="8.0.0" exclude="Build,Analyzers" />
         <dependency id="Microsoft.NET.StringTools" version="17.11.4" include="Runtime,Build,Native,ContentFiles,Analyzers,BuildTransitive" />
         <dependency id="System.Collections.Immutable" version="8.0.0" exclude="Build,Analyzers" />
@@ -46,8 +46,8 @@
         <dependency id="System.Runtime.CompilerServices.Unsafe" version="6.0.0" />
       </group>
       <group targetFramework=".NETStandard2.1">
-        <dependency id="MessagePackAnalyzer" version="3.1.0" include="All" />
-        <dependency id="MessagePack.Annotations" version="3.1.0" exclude="Build,Analyzers" />
+        <dependency id="MessagePackAnalyzer" version="3.1.1" include="All" />
+        <dependency id="MessagePack.Annotations" version="3.1.1" exclude="Build,Analyzers" />
         <dependency id="Microsoft.NET.StringTools" version="17.11.4" include="Runtime,Build,Native,ContentFiles,Analyzers,BuildTransitive" />
         <dependency id="System.Collections.Immutable" version="8.0.0" exclude="Build,Analyzers" />
       </group>
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/MessagePack.nuspec.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/MessagePack.nuspec.meta
similarity index 74%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/MessagePack.nuspec.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/MessagePack.nuspec.meta
index 5fc3d5693..0e495bea9 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/MessagePack.nuspec.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/MessagePack.nuspec.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 214fefe7ac26c714594436ae0fdffd00
+guid: 022a5a9f6f43b9041b48fe82e6326926
 DefaultImporter:
   externalObjects: {}
   userData: 
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib.meta
index b0ce08143..4f8f0d59d 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 4a2c9eb41fe913e4d8da459210e82524
+guid: 1b1de022bde59454fad62e4496f2d499
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1.meta
index 03b12d633..d974161ba 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 4feb421df759efb469a3eebf25248d6a
+guid: 7fc0987606104994988ef481706690d8
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.dll b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.dll
similarity index 94%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.dll
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.dll
index c0ad0a084..fe1792acf 100644
Binary files a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.dll and b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.dll differ
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.dll.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.dll.meta
similarity index 91%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.dll.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.dll.meta
index 52afb69ec..87ccb656b 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.dll.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.dll.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: e02b9498ccd4cb745b08f8984c4493fa
+guid: e61cd4daa6c10de4dae9535a1b0566a0
 labels:
 - NuGetForUnity
 PluginImporter:
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.xml b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.xml
similarity index 100%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.xml
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.xml
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.xml.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.xml.meta
similarity index 75%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.xml.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.xml.meta
index 56c047795..dd68f527e 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib/netstandard2.1/MessagePack.xml.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.1/lib/netstandard2.1/MessagePack.xml.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 11b89a3fe3b995645934365388b2239f
+guid: 3f81bcaf8909eb44a8f603d3ac3f87fe
 TextScriptImporter:
   externalObjects: {}
   userData: 
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1.meta
index b07087c62..9351fdad2 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 0f1abfb987285dd4ea4a89524bcd4104
+guid: ffdb5760d2df7e348be910138c8d59f9
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/.signature.p7s b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/.signature.p7s
similarity index 87%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/.signature.p7s
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/.signature.p7s
index 2884edffb..1e171b24a 100644
Binary files a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/.signature.p7s and b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/.signature.p7s differ
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/MessagePack.Annotations.nuspec b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/MessagePack.Annotations.nuspec
similarity index 89%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/MessagePack.Annotations.nuspec
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/MessagePack.Annotations.nuspec
index 56b564065..5bdea8cc7 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/MessagePack.Annotations.nuspec
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/MessagePack.Annotations.nuspec
@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
   <metadata>
     <id>MessagePack.Annotations</id>
-    <version>3.1.0</version>
+    <version>3.1.1</version>
     <title>MessagePack annotations for C#</title>
     <authors>neuecc,aarnott</authors>
     <license type="expression">MIT</license>
@@ -11,7 +11,7 @@
     <description>Attributes and interfaces for .NET types serializable with MessagePack.</description>
     <copyright>© Yoshifumi Kawai and contributors. All rights reserved.</copyright>
     <tags>MsgPack MessagePack Serialization Formatter Serializer Unity Xamarin</tags>
-    <repository type="git" url="https://github.com/MessagePack-CSharp/MessagePack-CSharp" commit="ff62247ddd554a64889fab9a450c4f4b54ab4c88" />
+    <repository type="git" url="https://github.com/MessagePack-CSharp/MessagePack-CSharp" commit="8373710fb0ae4bb453737f773b930401d8500c31" />
     <dependencies>
       <group targetFramework=".NETStandard2.0" />
     </dependencies>
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/MessagePack.Annotations.nuspec.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/MessagePack.Annotations.nuspec.meta
similarity index 74%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/MessagePack.Annotations.nuspec.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/MessagePack.Annotations.nuspec.meta
index 63af2a7f5..7e83beca5 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/MessagePack.Annotations.nuspec.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/MessagePack.Annotations.nuspec.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: b66ff9e55aaf92348aab890646b7091a
+guid: a71e93a8a884f144f9ba3d80dd6a2460
 DefaultImporter:
   externalObjects: {}
   userData: 
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib.meta
index 785740e51..09d8eee90 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.3.1.0/lib.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 2f4268b144531c943be5b6d92d031329
+guid: 13a87bc77b5d8144b82c15c323986fe9
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0.meta
index 270da8f64..67c9245d0 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 3d28bfcd07d40ba49982dddc3d179499
+guid: 902aed45e4e14a24fb4c3154119bde0c
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.dll b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.dll
similarity index 87%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.dll
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.dll
index e34ca146a..7118d0517 100644
Binary files a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.dll and b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.dll differ
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.dll.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.dll.meta
similarity index 91%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.dll.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.dll.meta
index f8980d875..b66bf296b 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.dll.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.dll.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: d28f7cebb097b9349b3876bb4356987a
+guid: cabd90cea3cfab84cb4af0b07d2facd8
 labels:
 - NuGetForUnity
 PluginImporter:
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.xml b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.xml
similarity index 100%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.xml
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.xml
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.xml.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.xml.meta
similarity index 75%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.xml.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.xml.meta
index e614c6e3f..f182a3d97 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.0/lib/netstandard2.0/MessagePack.Annotations.xml.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePack.Annotations.3.1.1/lib/netstandard2.0/MessagePack.Annotations.xml.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 3619126918d0b82488199e593e87c0f1
+guid: e7422252fbcb713458a71bbf84f09e90
 TextScriptImporter:
   externalObjects: {}
   userData: 
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0.meta
deleted file mode 100644
index 6de50af40..000000000
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0.meta
+++ /dev/null
@@ -1,8 +0,0 @@
-fileFormatVersion: 2
-guid: 8bc1020888d41df4181f769d782572b9
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1.meta
new file mode 100644
index 000000000..b111734a7
--- /dev/null
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1.meta
@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: d09a0ab192edd8941aeeae614bfd4216
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/.signature.p7s b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/.signature.p7s
similarity index 87%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/.signature.p7s
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/.signature.p7s
index d3135f03e..9e1e51c01 100644
Binary files a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/.signature.p7s and b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/.signature.p7s differ
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/MessagePackAnalyzer.nuspec b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/MessagePackAnalyzer.nuspec
similarity index 90%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/MessagePackAnalyzer.nuspec
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/MessagePackAnalyzer.nuspec
index 78db2ce32..c7617c8f9 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/MessagePackAnalyzer.nuspec
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/MessagePackAnalyzer.nuspec
@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
   <metadata>
     <id>MessagePackAnalyzer</id>
-    <version>3.1.0</version>
+    <version>3.1.1</version>
     <title>MessagePack Source Generator and Analyzer</title>
     <authors>neuecc,aarnott</authors>
     <developmentDependency>true</developmentDependency>
@@ -12,6 +12,6 @@
     <description>Analyzers and source generator for MessagePack for C#. Verify rules for [MessagePackObject] and code fix for [Key]. A roslyn source generator for AOT or faster startup of applications that use the MessagePack nuget package.</description>
     <copyright>© Yoshifumi Kawai and contributors. All rights reserved.</copyright>
     <tags>MsgPack MessagePack Serialization Formatter Analyzer</tags>
-    <repository type="git" url="https://github.com/MessagePack-CSharp/MessagePack-CSharp" commit="ff62247ddd554a64889fab9a450c4f4b54ab4c88" />
+    <repository type="git" url="https://github.com/MessagePack-CSharp/MessagePack-CSharp" commit="8373710fb0ae4bb453737f773b930401d8500c31" />
   </metadata>
 </package>
\ No newline at end of file
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/MessagePackAnalyzer.nuspec.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/MessagePackAnalyzer.nuspec.meta
similarity index 74%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/MessagePackAnalyzer.nuspec.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/MessagePackAnalyzer.nuspec.meta
index 682063d36..178f07928 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/MessagePackAnalyzer.nuspec.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/MessagePackAnalyzer.nuspec.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 019864da9a8dd634ab39545036845cb2
+guid: a2df65abec3af2940aa611508a42e706
 DefaultImporter:
   externalObjects: {}
   userData: 
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers.meta
index 2ac03c57b..d35fd7270 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: ec63de646c6a6d74faca9fb857b75b21
+guid: f406a5b33ad3cdc4da90bc6d76ef72fa
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3.meta
index 7fd33e757..1c3145686 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: e6abcf91762722749b65a6d3c9774c35
+guid: 2bc3ffabb7ff1894fa573700e7a68f30
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs.meta
similarity index 77%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs.meta
index fbd9ae959..48ce80785 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 1afb61fd784ffcf45a3a480ed0d99160
+guid: dd632628ec3050240aba7bf6f27d7935
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll
similarity index 94%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll
index 107ff38a5..7b11f045d 100644
Binary files a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll and b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll differ
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll.meta
similarity index 96%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll.meta
index c0bb8a17f..50970c112 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.Analyzers.CodeFixes.dll.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: e681870bd8e70dc408d3c6e18e8ebb9c
+guid: dbf1cd0f30ec2b040879dad72fbe917b
 labels:
 - NuGetForUnity
 - RoslynAnalyzer
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll
similarity index 59%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll
index 9a0ef0535..5719007e1 100644
Binary files a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll and b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll differ
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll.meta
similarity index 96%
rename from samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll.meta
rename to samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll.meta
index 8afe671fe..3559464d1 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.0/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/MessagePackAnalyzer.3.1.1/analyzers/roslyn4.3/cs/MessagePack.SourceGenerator.dll.meta
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 1b397b5d80368bd4e8a6e89339330cfd
+guid: 5a7f7460b8c3c1144bcfc510da77503e
 labels:
 - NuGetForUnity
 - RoslynAnalyzer
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/Packages/System.Collections.Immutable.8.0.0/Icon.png.meta b/samples/ChatApp/ChatApp.Unity/Assets/Packages/System.Collections.Immutable.8.0.0/Icon.png.meta
index 4b3433505..646a6a5b4 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/Packages/System.Collections.Immutable.8.0.0/Icon.png.meta
+++ b/samples/ChatApp/ChatApp.Unity/Assets/Packages/System.Collections.Immutable.8.0.0/Icon.png.meta
@@ -6,7 +6,7 @@ TextureImporter:
   serializedVersion: 13
   mipmaps:
     mipMapMode: 0
-    enableMipMap: 0
+    enableMipMap: 1
     sRGBTexture: 1
     linearTexture: 0
     fadeOut: 0
@@ -37,13 +37,13 @@ TextureImporter:
     filterMode: 1
     aniso: 1
     mipBias: 0
-    wrapU: 1
-    wrapV: 1
-    wrapW: 1
-  nPOTScale: 0
+    wrapU: 0
+    wrapV: 0
+    wrapW: 0
+  nPOTScale: 1
   lightmap: 0
   compressionQuality: 50
-  spriteMode: 1
+  spriteMode: 0
   spriteExtrude: 1
   spriteMeshType: 1
   alignment: 0
@@ -52,9 +52,9 @@ TextureImporter:
   spriteBorder: {x: 0, y: 0, z: 0, w: 0}
   spriteGenerateFallbackPhysicsShape: 1
   alphaUsage: 1
-  alphaIsTransparency: 1
+  alphaIsTransparency: 0
   spriteTessellationDetail: -1
-  textureType: 8
+  textureType: 0
   textureShape: 1
   singleChannelComponent: 0
   flipbookRows: 1
@@ -99,7 +99,7 @@ TextureImporter:
     outline: []
     physicsShape: []
     bones: []
-    spriteID: 5e97eb03825dee720800000000000000
+    spriteID: 
     internalID: 0
     vertices: []
     indices: 
diff --git a/samples/ChatApp/ChatApp.Unity/Assets/packages.config b/samples/ChatApp/ChatApp.Unity/Assets/packages.config
index 113803d2b..70ea1100d 100644
--- a/samples/ChatApp/ChatApp.Unity/Assets/packages.config
+++ b/samples/ChatApp/ChatApp.Unity/Assets/packages.config
@@ -3,16 +3,16 @@
   <package id="Grpc.Core.Api" version="2.66.0" />
   <package id="Grpc.Net.Client" version="2.66.0" manuallyInstalled="true" />
   <package id="Grpc.Net.Common" version="2.66.0" />
-  <package id="MessagePack" version="3.1.0" manuallyInstalled="true" />
-  <package id="MessagePack.Annotations" version="3.1.0" />
-  <package id="MessagePackAnalyzer" version="3.1.0" />
+  <package id="MessagePack" version="3.1.1" manuallyInstalled="true" />
+  <package id="MessagePack.Annotations" version="3.1.1" />
+  <package id="MessagePackAnalyzer" version="3.1.1" />
   <package id="Microsoft.Bcl.AsyncInterfaces" version="8.0.0" />
   <package id="Microsoft.Bcl.TimeProvider" version="8.0.1" manuallyInstalled="true" />
   <package id="Microsoft.Extensions.Logging.Abstractions" version="6.0.0" />
   <package id="Microsoft.NET.StringTools" version="17.11.4" manuallyInstalled="true" />
+  <package id="System.Collections.Immutable" version="8.0.0" />
   <package id="System.Diagnostics.DiagnosticSource" version="6.0.1" />
   <package id="System.IO.Pipelines" version="8.0.0" manuallyInstalled="true" />
-  <package id="System.Collections.Immutable" version="8.0.0" />
   <package id="System.Runtime.CompilerServices.Unsafe" version="6.0.0" />
   <package id="System.Threading.Channels" version="8.0.0" manuallyInstalled="true" />
 </packages>
\ No newline at end of file