diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 644835656..07a1becf9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
 
     if: ${{ !contains(github.event.head_commit.message, '[skip ci]') }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: cachix/install-nix-action@v30
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
@@ -45,7 +45,7 @@ jobs:
 
     if: ${{ !contains(github.event.head_commit.message, '[skip ci]') }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: cachix/install-nix-action@v30
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/doxygen.yml b/.github/workflows/doxygen.yml
index f69802030..5b2d89bd3 100644
--- a/.github/workflows/doxygen.yml
+++ b/.github/workflows/doxygen.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: cachix/install-nix-action@v30
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Build doxygen documentation
         run: nix shell nixpkgs#doxygen nixpkgs#graphviz --command doxygen
       - name: Deploy
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 3c67ac93d..ec8645e1c 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -20,6 +20,6 @@ jobs:
       with:
         name: nix-community
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build flake
       run: nix build -L #.