diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index bf446e5ad..cccf83a22 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -17,7 +17,7 @@
   "tools/flagd-http-connector": "0.0.5",
   "tools/flagd-api": "1.0.0",
   "tools/flagd-api-testkit": "0.3.0",
-  "tools/flagd-core": "3.0.0",
+  "tools/flagd-core": "4.0.0",
   "tools/tck": "0.1.0",
   ".": "1.0.0",
   "providers/optimizely": "1.0.0"
diff --git a/tools/flagd-core/CHANGELOG.md b/tools/flagd-core/CHANGELOG.md
index a17f983af..a8b94daa8 100644
--- a/tools/flagd-core/CHANGELOG.md
+++ b/tools/flagd-core/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## [4.0.0](https://github.com/open-feature/java-sdk-contrib/compare/dev.openfeature.contrib.tools.flagdcore-v3.0.0...dev.openfeature.contrib.tools.flagdcore-v4.0.0) (2026-11-06)
+
+
+### ⚠ BREAKING CHANGES
+
+* **flagd-core:** stop narrowing a number to an integer when that loses something ([#1957](https://github.com/open-feature/java-sdk-contrib/issues/1957))
+
+### 🐛 Bug Fixes
+
+* **flagd-core:** stop narrowing a number to an integer when that loses something ([#1957](https://github.com/open-feature/java-sdk-contrib/issues/1957)) ([5f144ad](https://github.com/open-feature/java-sdk-contrib/commit/5f144ad47c76e8023c79425c4e7e563b9e475f78))
+
+
+### ✨ New Features
+
+* json-logic++ (precompilation), improve e2e ([#1968](https://github.com/open-feature/java-sdk-contrib/issues/1968)) ([ad4ad04](https://github.com/open-feature/java-sdk-contrib/commit/ad4ad04f7ba23eb7e34fca8dcc21237ce30e1ba2))
+* 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))
+
 ## [3.0.0](https://github.com/open-feature/java-sdk-contrib/compare/dev.openfeature.contrib.tools.flagdcore-v2.0.4...dev.openfeature.contrib.tools.flagdcore-v3.0.0) (2026-10-15)
 
 
diff --git a/tools/flagd-core/README.md b/tools/flagd-core/README.md
index 8d6a5bbff..389440884 100644
--- a/tools/flagd-core/README.md
+++ b/tools/flagd-core/README.md
@@ -28,7 +28,7 @@ ProviderEvaluation<Boolean> result = core.resolveBooleanValue("myBoolFlag", eval
 <dependency>
     <groupId>dev.openfeature.contrib.tools</groupId>
     <artifactId>flagd-core</artifactId>
-    <version>3.0.0</version> <!--x-release-please-version -->
+    <version>4.0.0</version> <!--x-release-please-version -->
 </dependency>
 ```
 
diff --git a/tools/flagd-core/pom.xml b/tools/flagd-core/pom.xml
index a3958a361..54b0f6122 100644
--- a/tools/flagd-core/pom.xml
+++ b/tools/flagd-core/pom.xml
@@ -10,7 +10,7 @@
     </parent>
     <groupId>dev.openfeature.contrib.tools</groupId>
     <artifactId>flagd-core</artifactId>
-    <version>3.0.0</version> <!--x-release-please-version -->
+    <version>4.0.0</version> <!--x-release-please-version -->
 
     <properties>
         <module-name>${groupId}.flagdcore</module-name>
diff --git a/tools/flagd-core/version.txt b/tools/flagd-core/version.txt
index 4a36342fc..fcdb2e109 100644
--- a/tools/flagd-core/version.txt
+++ b/tools/flagd-core/version.txt
@@ -1 +1 @@
-3.0.0
+4.0.0