diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c0ca11a6a..ade59ae78 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -80,7 +80,7 @@ jobs:
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@v10
       - name: Cache Nix dependencies
-        uses: DeterminateSystems/magic-nix-cache-action@v3
+        uses: DeterminateSystems/magic-nix-cache-action@v4
       - name: Setup developer environment
         run: |
           nix develop --command ./bootstrap.sh
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index db27261bb..b604f3478 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -18,7 +18,7 @@ jobs:
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@v10
       - name: Cache Nix dependencies
-        uses: DeterminateSystems/magic-nix-cache-action@v3
+        uses: DeterminateSystems/magic-nix-cache-action@v4
       # Upstream package sometimes has flags set that disable flake checking
       - name: Setup test env
         run: |