diff --git a/.gitea/workflows/build-java.yml b/.gitea/workflows/build-java.yml
index a872055..dc1f623 100644
--- a/.gitea/workflows/build-java.yml
+++ b/.gitea/workflows/build-java.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         java_version: [21]
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
     - name: Login to Registry
       uses: docker/login-action@v3
diff --git a/.gitea/workflows/build-php.yml b/.gitea/workflows/build-php.yml
index c1c0af8..f17ec6f 100644
--- a/.gitea/workflows/build-php.yml
+++ b/.gitea/workflows/build-php.yml
@@ -13,7 +13,7 @@ jobs:
       matrix:
         php_version: [82, 84]
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
     - name: Login to Registry
       uses: docker/login-action@v3
diff --git a/.gitea/workflows/build-python.yml b/.gitea/workflows/build-python.yml
index ceb8e2b..c9116b4 100644
--- a/.gitea/workflows/build-python.yml
+++ b/.gitea/workflows/build-python.yml
@@ -10,7 +10,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
     - name: Login to Registry
       uses: docker/login-action@v3