diff --git a/.github/workflows/draft.yml b/.github/workflows/draft.yml
index bcdcf99..e4ba17b 100644
--- a/.github/workflows/draft.yml
+++ b/.github/workflows/draft.yml
@@ -16,7 +16,7 @@ jobs:
         cache: pip
 
     - name: Clone
-      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
+      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
 
     - name: Build specification
       run: |
@@ -25,7 +25,7 @@ jobs:
         make -f ../Makefile draft
 
     - name: Switch branch
-      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
+      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       with:
         ref: gh-pages
         clean: false
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index ba48d30..534f451 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -9,7 +9,7 @@ jobs:
     name: Sanity checks before a PR merge
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
         with:
           fetch-depth: 0 # we want all refs for the --is-ancestor check
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 46e0aee..b18ca1a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
       contents: write # required to publish (tag) a release 
     steps:
     - name: Clone main
-      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
+      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       with:
         fetch-depth: 0
 
@@ -53,7 +53,7 @@ jobs:
 
     - name: Switch branch
       if: steps.getver.outputs.spec_version != steps.prevver.outputs.prev_version
-      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
+      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       with:
         ref: gh-pages
         clean: false