diff --git a/.gitea/workflows/build-java.yml b/.gitea/workflows/build-java.yml
index b0a5873..993179e 100644
--- a/.gitea/workflows/build-java.yml
+++ b/.gitea/workflows/build-java.yml
@@ -15,7 +15,7 @@ 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 380e826..fc8e216 100644
--- a/.gitea/workflows/build-php.yml
+++ b/.gitea/workflows/build-php.yml
@@ -15,7 +15,7 @@ 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 c730c6d..b769b3a 100644
--- a/.gitea/workflows/build-python.yml
+++ b/.gitea/workflows/build-python.yml
@@ -12,7 +12,7 @@ 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