diff --git a/.github/workflows/auto-label-issues.yml b/.github/workflows/auto-label-issues.yml
index 172ef67..e7dd49a 100644
--- a/.github/workflows/auto-label-issues.yml
+++ b/.github/workflows/auto-label-issues.yml
@@ -11,7 +11,7 @@ jobs:
       issues: write
     steps:
       - name: Apply labels from form dropdowns
-        uses: actions/github-script@v9
+        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9
         with:
           # SECURITY NOTE: This is safe because we use actions/github-script
           # which processes data in JavaScript, not shell commands.
diff --git a/.github/workflows/validate-plugin.yml b/.github/workflows/validate-plugin.yml
index 090aa46..f7dd9ba 100644
--- a/.github/workflows/validate-plugin.yml
+++ b/.github/workflows/validate-plugin.yml
@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
 
       - name: Setup Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6
         with:
           go-version: '1.26'
 
@@ -54,7 +54,7 @@ jobs:
           fi
 
       - name: Setup Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6
         with:
           python-version: '3.14'
 
@@ -136,7 +136,7 @@ jobs:
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
 
       - name: Setup Python 3.9
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6
         with:
           python-version: '3.9'
 
diff --git a/.github/workflows/validate-skills.yml b/.github/workflows/validate-skills.yml
index 52767a2..586302c 100644
--- a/.github/workflows/validate-skills.yml
+++ b/.github/workflows/validate-skills.yml
@@ -24,7 +24,7 @@ jobs:
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
 
       - name: Setup Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6
         with:
           python-version: "3.14"