diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index c3a3be2..f616ab7 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -201,6 +201,6 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Run actionlint
-        uses: docker://rhysd/actionlint:1.7.12
+        uses: docker://rhysd/actionlint:1.7.12@sha256:b1934ee5f1c509618f2508e6eb47ee0d3520686341fec936f3b79331f9315667
         with:
           args: -color