diff --git a/.github/workflows/dotnet.yaml b/.github/workflows/dotnet.yaml
index e3b1540..f30da06 100644
--- a/.github/workflows/dotnet.yaml
+++ b/.github/workflows/dotnet.yaml
@@ -18,7 +18,7 @@ jobs:
   build-windows:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 0 # so that NerdBank.GitVersioning has access to history
     - uses: actions/setup-dotnet@v4
@@ -43,7 +43,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 0 # so that NerdBank.GitVersioning has access to history
     - name: Install Nix
@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Install Nix
         uses: cachix/install-nix-action@v31
         with:
@@ -85,7 +85,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Install Nix
         uses: cachix/install-nix-action@v31
         with:
@@ -98,7 +98,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Install Nix
         uses: cachix/install-nix-action@v31
         with:
@@ -136,7 +136,7 @@ jobs:
   nuget-pack:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 0 # so that NerdBank.GitVersioning has access to history
     - name: Install Nix
@@ -173,7 +173,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [nuget-pack]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Download NuGet artifact
         uses: actions/download-artifact@v5
         with:
@@ -234,7 +234,7 @@ jobs:
       attestations: write
       contents: read
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Install Nix
         uses: cachix/install-nix-action@v31
         with:
@@ -264,7 +264,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Download NuGet artifact
         uses: actions/download-artifact@v5
         with:
diff --git a/.github/workflows/flake_update.yaml b/.github/workflows/flake_update.yaml
index 9a84993..36cdb6e 100644
--- a/.github/workflows/flake_update.yaml
+++ b/.github/workflows/flake_update.yaml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main