diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 6d4bf5b..71c2b2e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -21,7 +21,7 @@ jobs:
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up magic Nix cache
-        uses: DeterminateSystems/magic-nix-cache-action@8a218f9e264e9c3803c9a1ee1c30d8e4ab55be63 # v2
+        uses: DeterminateSystems/magic-nix-cache-action@fc6aaceb40b9845a02b91e059ec147e78d1b4e41 # v4
 
       - name: Prepare Nix shell
         run: nix develop --impure .#ci
@@ -58,7 +58,7 @@ jobs:
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up magic Nix cache
-        uses: DeterminateSystems/magic-nix-cache-action@8a218f9e264e9c3803c9a1ee1c30d8e4ab55be63 # v2
+        uses: DeterminateSystems/magic-nix-cache-action@fc6aaceb40b9845a02b91e059ec147e78d1b4e41 # v4
 
       - name: Check
         run: nix flake check --impure