diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e46b8c4..716288c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
   format:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: DeterminateSystems/nix-installer-action@main
     - uses: DeterminateSystems/magic-nix-cache-action@main
     - name: Check rustfmt
@@ -17,7 +17,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: DeterminateSystems/nix-installer-action@main
     - uses: DeterminateSystems/magic-nix-cache-action@main
     - name: Build
@@ -26,7 +26,7 @@ jobs:
   NixFlakeCheck:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: DeterminateSystems/flake-checker-action@main
       with:
         fail-mode: false
@@ -34,7 +34,7 @@ jobs:
   NixFormatting:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - uses: DeterminateSystems/nix-installer-action@main
@@ -45,7 +45,7 @@ jobs:
   EditorConfig:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: greut/eclint-action@v0
@@ -53,7 +53,7 @@ jobs:
   SynthesizeIntegration:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - uses: DeterminateSystems/nix-installer-action@main
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 19b5340..27c04f0 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
       - name: Enable magic Nix cache