diff --git a/.github/workflows/test-docs.yml b/.github/workflows/test-docs.yml
index acc65bf2..20bb89b1 100644
--- a/.github/workflows/test-docs.yml
+++ b/.github/workflows/test-docs.yml
@@ -22,7 +22,7 @@ jobs:
   test-docs:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
         with:
           # make rediraffecheckdiff requires git history to compare current
           # commit with the main branch and previous releases.
diff --git a/.github/workflows/test-ssh.yml b/.github/workflows/test-ssh.yml
index 6daed594..34369d25 100644
--- a/.github/workflows/test-ssh.yml
+++ b/.github/workflows/test-ssh.yml
@@ -51,7 +51,7 @@ jobs:
             runs_on: windows-2022
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d31e3b28..7a1ea0fc 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -53,7 +53,7 @@ jobs:
             pre: pre
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
         with:
           persist-credentials: false
 
diff --git a/.github/workflows/windows-ssh-image.yaml b/.github/workflows/windows-ssh-image.yaml
index fb666129..b7c5e2cf 100644
--- a/.github/workflows/windows-ssh-image.yaml
+++ b/.github/workflows/windows-ssh-image.yaml
@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           persist-credentials: false