diff --git a/.github/workflows/dev_cron.yml b/.github/workflows/dev_cron.yml
index ab2840eb..e88e767e 100644
--- a/.github/workflows/dev_cron.yml
+++ b/.github/workflows/dev_cron.yml
@@ -25,19 +25,22 @@ on:
       - edited
       - synchronize
 
+permissions: read-all
+
 jobs:
   process:
     name: Process
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
+
 
       - name: Comment Issues link
         if: |
           github.event_name == 'pull_request_target' &&
             (github.event.action == 'opened' ||
              github.event.action == 'edited')
-        uses: actions/github-script@v3
+        uses: actions/github-script@ffc2c79a5b2490bd33e0a41c1de74b877714d736 # v3.2.0
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
@@ -49,7 +52,7 @@ jobs:
           github.event_name == 'pull_request_target' &&
             (github.event.action == 'opened' ||
              github.event.action == 'edited')
-        uses: actions/github-script@v3
+        uses: actions/github-script@ffc2c79a5b2490bd33e0a41c1de74b877714d736 # v3.2.0
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |