diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index e7ce682..e0af74b 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -11,7 +11,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v7
+    - uses: actions/checkout@v6
     - uses: wimpysworld/nothing-but-nix@main
       with:
         hatchet-protocol: 'carve'
@@ -104,7 +104,7 @@ jobs:
   test-with-python:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v7
+    - uses: actions/checkout@v6
     - uses: wimpysworld/nothing-but-nix@main
       with:
         hatchet-protocol: 'carve'
@@ -160,7 +160,7 @@ jobs:
   test-with-julia:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v7
+    - uses: actions/checkout@v6
     - uses: wimpysworld/nothing-but-nix@main
       with:
         hatchet-protocol: 'carve'
diff --git a/.github/workflows/check_ed.yml b/.github/workflows/check_ed.yml
index 1e26a31..497d060 100644
--- a/.github/workflows/check_ed.yml
+++ b/.github/workflows/check_ed.yml
@@ -21,7 +21,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
     steps:
-    - uses: actions/checkout@v7
+    - uses: actions/checkout@v6
     - uses: cachix/install-nix-action@v31
       with:
         github_access_token: ${{ github.token }}
@@ -51,7 +51,7 @@ jobs:
   test-with-python:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v7
+    - uses: actions/checkout@v6
     - uses: cachix/install-nix-action@v31
       with:
         github_access_token: ${{ github.token }}
@@ -88,7 +88,7 @@ jobs:
   test-with-julia:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v7
+    - uses: actions/checkout@v6
     - uses: cachix/install-nix-action@v31
       with:
         github_access_token: ${{ github.token }}
diff --git a/.github/workflows/check_macos.yml b/.github/workflows/check_macos.yml
index 9c133a8..ad9d3ed 100644
--- a/.github/workflows/check_macos.yml
+++ b/.github/workflows/check_macos.yml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         os: [macos-latest]
     steps:
-    - uses: actions/checkout@v7
+    - uses: actions/checkout@v6
     - uses: cachix/install-nix-action@v31
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/flakehub-publish-rolling.yml b/.github/workflows/flakehub-publish-rolling.yml
index 23bef1e..80ff807 100644
--- a/.github/workflows/flakehub-publish-rolling.yml
+++ b/.github/workflows/flakehub-publish-rolling.yml
@@ -10,7 +10,7 @@ jobs:
       id-token: "write"
       contents: "read"
     steps:
-      - uses: "actions/checkout@v7"
+      - uses: "actions/checkout@v6"
         with:
           persist-credentials: false
       - uses: "DeterminateSystems/determinate-nix-action@v3"
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 63f205f..4b3cb00 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v6
       - uses: wimpysworld/nothing-but-nix@main
         with:
           hatchet-protocol: 'carve'