diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index bf446e5ad8..9319839bdd 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -16,7 +16,7 @@
   "tools/junit-openfeature": "0.2.2",
   "tools/flagd-http-connector": "0.0.5",
   "tools/flagd-api": "1.0.0",
-  "tools/flagd-api-testkit": "0.3.0",
+  "tools/flagd-api-testkit": "0.4.0",
   "tools/flagd-core": "3.0.0",
   "tools/tck": "0.1.0",
   ".": "1.0.0",
diff --git a/tools/flagd-api-testkit/CHANGELOG.md b/tools/flagd-api-testkit/CHANGELOG.md
index 6063364d95..a142772ffc 100644
--- a/tools/flagd-api-testkit/CHANGELOG.md
+++ b/tools/flagd-api-testkit/CHANGELOG.md
@@ -1,5 +1,23 @@
 # Changelog
 
+## [0.4.0](https://github.com/open-feature/java-sdk-contrib/compare/dev.openfeature.contrib.tools.flagdapitestkit-v0.3.0...dev.openfeature.contrib.tools.flagdapitestkit-v0.4.0) (2026-11-05)
+
+
+### ⚠ BREAKING CHANGES
+
+* bucket on any context type; (fractional re-assignment) ([#1831](https://github.com/open-feature/java-sdk-contrib/issues/1831))
+
+### 🐛 Bug Fixes
+
+* **security:** update dependency com.fasterxml.jackson.core:jackson-databind to v2.22.2 [security] ([#1873](https://github.com/open-feature/java-sdk-contrib/issues/1873)) ([6be185a](https://github.com/open-feature/java-sdk-contrib/commit/6be185a5611a322292578f52c76dd2a677291d94))
+* **security:** update vulnerability-updates to v2.22.3 [security] ([#1882](https://github.com/open-feature/java-sdk-contrib/issues/1882)) ([c8f021d](https://github.com/open-feature/java-sdk-contrib/commit/c8f021dd40760790d0ddd93f4f2dc58dc4b3f449))
+
+
+### ✨ New Features
+
+* bucket on any context type; (fractional re-assignment) ([#1831](https://github.com/open-feature/java-sdk-contrib/issues/1831)) ([a6cc606](https://github.com/open-feature/java-sdk-contrib/commit/a6cc606b03a1a23986117f62f80157a2c7c935c9))
+* lossless numeric coercion and safe range ([#1959](https://github.com/open-feature/java-sdk-contrib/issues/1959)) ([d69a23f](https://github.com/open-feature/java-sdk-contrib/commit/d69a23fc9578a4ec03348f299753b61f3914794d))
+
 ## [0.3.0](https://github.com/open-feature/java-sdk-contrib/compare/dev.openfeature.contrib.tools.flagdapitestkit-v0.2.1...dev.openfeature.contrib.tools.flagdapitestkit-v0.3.0) (2026-09-14)
 
 
diff --git a/tools/flagd-api-testkit/pom.xml b/tools/flagd-api-testkit/pom.xml
index a406c73282..3b517b5abc 100644
--- a/tools/flagd-api-testkit/pom.xml
+++ b/tools/flagd-api-testkit/pom.xml
@@ -10,7 +10,7 @@
     </parent>
     <groupId>dev.openfeature.contrib.tools</groupId>
     <artifactId>flagd-api-testkit</artifactId>
-    <version>0.3.0</version> <!--x-release-please-version -->
+    <version>0.4.0</version> <!--x-release-please-version -->
 
     <properties>
         <module-name>${groupId}.flagdapitestkit</module-name>
diff --git a/tools/flagd-api-testkit/version.txt b/tools/flagd-api-testkit/version.txt
index 0d91a54c7d..1d0ba9ea18 100644
--- a/tools/flagd-api-testkit/version.txt
+++ b/tools/flagd-api-testkit/version.txt
@@ -1 +1 @@
-0.3.0
+0.4.0