diff --git a/CHANGELOG.md b/CHANGELOG.md
index 73e473c3..42288fb4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 0.5.5
+* Adds a namespace in `build.gradle` for compatibility with AGP 8.0.
+
 # 0.5.4
 * Added MacOS desktop support.
 * Added Windows desktop support.
diff --git a/android/build.gradle b/android/build.gradle
index 0322c90c..f28ee5fb 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -25,6 +25,11 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
+    // Conditional for compatibility with AGP <4.2.
+    if (project.android.hasProperty("namespace")) {
+        namespace 'dev.google.webcrypto'
+    }
+
     compileSdkVersion 31
 
     // We depend on cmake for the native parts.
diff --git a/pubspec.yaml b/pubspec.yaml
index 8a5802e6..21ebc9ef 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 name: webcrypto
-version: 0.5.4
+version: 0.5.5
 description: Cross-platform implementation of Web Cryptography APIs for Flutter.
 repository: https://github.com/google/webcrypto.dart