diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 4d20436..12ef0bf 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "4.0.0"
+    ".": "4.1.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4bd877d..69bcc2b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [4.1.0](https://github.com/headlesshq/mc-runtime-test/compare/4.0.0...4.1.0) (2025-11-12)
+
+
+### Features
+
+* **mod:** Support 1.21.6 ([#81](https://github.com/headlesshq/mc-runtime-test/issues/81)) ([fef5a7f](https://github.com/headlesshq/mc-runtime-test/commit/fef5a7fdb0fd5eec30a8179e6eeb768373936276))
+
 ## [4.0.0](https://github.com/headlesshq/mc-runtime-test/compare/3.1.1...4.0.0) (2025-11-10)
 
 
diff --git a/README.md b/README.md
index 8df6c86..4b152ac 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ jobs:
           cp build/libs/<your-mod>.jar run/mods
 
       - name: Run MC test client
-        uses: headlesshq/mc-runtime-test@4.0.0 <!-- x-release-please-version -->
+        uses: headlesshq/mc-runtime-test@4.1.0 <!-- x-release-please-version -->
         with:
           mc: 1.21.5
           modloader: fabric
diff --git a/action.yml b/action.yml
index 1827a08..ba88751 100644
--- a/action.yml
+++ b/action.yml
@@ -102,7 +102,7 @@ runs:
       uses: robinraju/release-downloader@a96f54c1b5f5e09e47d9504526e96febd949d4c2 # v1.11
       with:
         repository: headlesshq/mc-runtime-test
-        tag: "4.0.0" # x-release-please-version
+        tag: "4.1.0" # x-release-please-version
         fileName: 'mc-runtime-test-${{ inputs.mc }}-*-${{ inputs.mc-runtime-test }}-release.jar'
         out-file-path: run/mods
 
diff --git a/api/gradle.properties b/api/gradle.properties
index 7305402..a24ba6e 100644
--- a/api/gradle.properties
+++ b/api/gradle.properties
@@ -1,3 +1,3 @@
 # x-release-please-start-version
-project_version = 4.0.0
+project_version = 4.1.0
 # x-release-please-end