diff --git a/.github/workflows/export-codelab.yml b/.github/workflows/export-codelab.yml
index 7bf158fa..ab038c45 100644
--- a/.github/workflows/export-codelab.yml
+++ b/.github/workflows/export-codelab.yml
@@ -37,7 +37,7 @@ jobs:
       
       - name: Get all changed markdown files
         id: changed-markdown-files
-        uses: tj-actions/changed-files@v40
+        uses: tj-actions/changed-files@af292f1e845a0377b596972698a8598734eb2796 # v40
         with:
           files: | 
             **.md
diff --git a/.github/workflows/netlify.yml b/.github/workflows/netlify.yml
index 87e58666..f925c7f2 100644
--- a/.github/workflows/netlify.yml
+++ b/.github/workflows/netlify.yml
@@ -44,7 +44,7 @@ jobs:
       
       - name: Get all changed markdown files
         id: changed-markdown-files
-        uses: tj-actions/changed-files@v40
+        uses: tj-actions/changed-files@af292f1e845a0377b596972698a8598734eb2796 # v40
         with:
           files: | 
             **.md