diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 529924835..06e22c282 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,7 +17,7 @@ jobs:
     steps:
 
       - name: checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: build
         uses: leanprover/lean-action@v1
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 0e8f44988..155db2be4 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -12,7 +12,7 @@ jobs:
     steps:
 
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Install Lean
         uses: leanprover/lean-action@v1
diff --git a/.github/workflows/push-to-nightly.yml b/.github/workflows/push-to-nightly.yml
index 30e4a260d..21cabd90f 100644
--- a/.github/workflows/push-to-nightly.yml
+++ b/.github/workflows/push-to-nightly.yml
@@ -12,7 +12,7 @@ jobs:
     steps:
 
       - name: checkout repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           ref: nightly-testing
           fetch-depth: 0
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 2e68cdcfc..ea26637c5 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -14,7 +14,7 @@ jobs:
     steps:
 
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Install Lean
         uses: leanprover/lean-action@v1
diff --git a/.github/workflows/update-nightly-toolchain.yml b/.github/workflows/update-nightly-toolchain.yml
index 04deec477..ca558990f 100644
--- a/.github/workflows/update-nightly-toolchain.yml
+++ b/.github/workflows/update-nightly-toolchain.yml
@@ -11,7 +11,7 @@ jobs:
     steps:
 
       - name: checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           ref: nightly-testing
           token: ${{ secrets.UNICODE_BASIC_TOKEN }}
diff --git a/.github/workflows/update-toolchain.yml b/.github/workflows/update-toolchain.yml
index f251f3215..6e771ae30 100644
--- a/.github/workflows/update-toolchain.yml
+++ b/.github/workflows/update-toolchain.yml
@@ -12,7 +12,7 @@ jobs:
     steps:
 
       - name: checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           ref: nightly-testing
           fetch-depth: 0