diff --git a/src/MemoryPack.Unity/Assets/MemoryPack.Unity/package.json b/src/MemoryPack.Unity/Assets/MemoryPack.Unity/package.json
index d63cb2d..653521f 100644
--- a/src/MemoryPack.Unity/Assets/MemoryPack.Unity/package.json
+++ b/src/MemoryPack.Unity/Assets/MemoryPack.Unity/package.json
@@ -2,7 +2,7 @@
     "name": "com.cysharp.memorypack",
     "displayName": "MemoryPack",
     "author": { "name": "Cysharp, Inc.", "url": "https://cysharp.co.jp/en/" },
-    "version": "1.10.0",
+    "version": "1.20.0",
     "unity": "2022.3",
     "unityRelease": "12f1",
     "description": "Zero encoding extreme performance binary serializer for C#.",