diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 600835d..5666d54 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "0.5.0"
+    ".": "0.5.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf07682..0338d98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.5.1](https://github.com/StackOneHQ/defender/compare/defender-v0.5.0...defender-v0.5.1) (2026-03-25)
+
+
+### Bug Fixes
+
+* **ENG-12448:** upgrade ML classifier to jbv2 (AgentShield 73.7 → 79.8) ([#25](https://github.com/StackOneHQ/defender/issues/25)) ([3061239](https://github.com/StackOneHQ/defender/commit/30612391690390112fe5da5eb065c7205da43378))
+
 ## [0.5.0](https://github.com/StackOneHQ/defender/compare/defender-v0.4.5...defender-v0.5.0) (2026-03-23)
 
 
diff --git a/package-lock.json b/package-lock.json
index 99c3489..26f021f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "@stackone/defender",
-    "version": "0.5.0",
+    "version": "0.5.1",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "@stackone/defender",
-            "version": "0.5.0",
+            "version": "0.5.1",
             "license": "Apache-2.0",
             "dependencies": {
                 "nanoid": "3.3.11"
diff --git a/package.json b/package.json
index 67f7ccc..438dd8c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@stackone/defender",
-    "version": "0.5.0",
+    "version": "0.5.1",
     "description": "Prompt injection defense framework for AI tool-calling",
     "main": "dist/index.cjs",
     "module": "dist/index.mjs",