diff --git a/CHANGELOG.md b/CHANGELOG.md
index 49169af3..7a4b03f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+### Version 4.21.1 (4th May 2020)
+#### Fixed
+- Removed iAd timer from iOS native SDK.
+
+#### Native SDKs
+- [iOS@v4.21.3][ios_sdk_v4.21.3]
+- [Android@v4.21.1][android_sdk_v4.21.1]
+
+---
+
 ### Version 4.21.0 (10th April 2020)
 #### Added
 - Added support for Huawei App Gallery install referrer.
@@ -441,6 +451,7 @@
 [ios_sdk_v4.17.1]: https://github.com/adjust/ios_sdk/tree/v4.17.1
 [ios_sdk_v4.18.3]: https://github.com/adjust/ios_sdk/tree/v4.18.3
 [ios_sdk_v4.21.1]: https://github.com/adjust/ios_sdk/tree/v4.21.1
+[ios_sdk_v4.21.3]: https://github.com/adjust/ios_sdk/tree/v4.21.3
 
 [android_sdk_v2.1.3]: https://github.com/adjust/android_sdk/tree/v2.1.3
 [android_sdk_v2.1.4]: https://github.com/adjust/android_sdk/tree/v2.1.4
diff --git a/example/lib/Adjust-4.21.0.ane b/example/lib/Adjust-4.21.0.ane
deleted file mode 100644
index be3b7a4a..00000000
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diff --git a/example/lib/Adjust-4.21.1.ane b/example/lib/Adjust-4.21.1.ane
new file mode 100644
index 00000000..bb28ad74
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diff --git a/ext/android/sdk b/ext/android/sdk
index b10a8724..91ca35fa 160000
--- a/ext/android/sdk
+++ b/ext/android/sdk
@@ -1 +1 @@
-Subproject commit b10a872446bf151cce569f34ff80a291c3dd9fdd
+Subproject commit 91ca35faa359e58b801f5aa280d797d2ff7daee7
diff --git a/ext/ios/sdk b/ext/ios/sdk
index 2dad132c..8c1f10be 160000
--- a/ext/ios/sdk
+++ b/ext/ios/sdk
@@ -1 +1 @@
-Subproject commit 2dad132c427a9b9e8c1ea428a2ddbb4f80e45ff2
+Subproject commit 8c1f10bedf54e9581365555194dd80b0a7914877
diff --git a/test/app/Main.as b/test/app/Main.as
index 2c986407..e01570e0 100644
--- a/test/app/Main.as
+++ b/test/app/Main.as
@@ -8,7 +8,7 @@ package {
     public class Main extends Sprite {
         // Android: Make sure to use HTTPS with port 8443 with a physical device.
         // iOS: Make sure to use HTTP with port 8080 with a physical device.
-        public static var ipAddress:String = '192.168.86.28';
+        public static var ipAddress:String = '192.168.86.32';
         public static var baseUrl:String = 'https://' + ipAddress + ':8443';
         public static var gdprUrl:String = 'https://' + ipAddress + ':8443';
         public static var controlUrl:String = 'ws://' + ipAddress + ':1987';
diff --git a/test/app/lib/AdjustTest-4.21.0.ane b/test/app/lib/AdjustTest-4.21.0.ane
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index 00000000..9001a62c
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diff --git a/test/plugin/ios/AdjustTestLibrary.framework/AdjustTestLibrary b/test/plugin/ios/AdjustTestLibrary.framework/AdjustTestLibrary
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