diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f25ac099..15fe9ae1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,7 +35,7 @@ jobs:
         uses: cachix/install-nix-action@v31
 
       - name: Enable Nix cache
-        uses: DeterminateSystems/magic-nix-cache-action@v14
+        uses: DeterminateSystems/magic-nix-cache-action@v15
 
       - name: Validate flake
         run: nix flake check
diff --git a/.github/workflows/test-suite.yml b/.github/workflows/test-suite.yml
index 7726d4a3..2d93d8bc 100644
--- a/.github/workflows/test-suite.yml
+++ b/.github/workflows/test-suite.yml
@@ -35,7 +35,7 @@ jobs:
         uses: cachix/install-nix-action@v31
 
       - name: Enable Nix cache
-        uses: DeterminateSystems/magic-nix-cache-action@v14
+        uses: DeterminateSystems/magic-nix-cache-action@v15
 
       - name: Run full test suite
         run: ./scripts/test-suite.sh