diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 36a2b6d..50290d7 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -22,7 +22,7 @@ jobs:
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up magic Nix cache
-        uses: DeterminateSystems/magic-nix-cache-action@87b14cf437d03d37989d87f0fa5ce4f5dc1a330b # v8
+        uses: DeterminateSystems/magic-nix-cache-action@6221693898146dc97e38ad0e013488a16477a4c4 # v9
 
       - name: Prepare Nix shell
         run: nix develop --impure .#ci
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 149a768..0acbd51 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -24,7 +24,7 @@ jobs:
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up magic Nix cache
-        uses: DeterminateSystems/magic-nix-cache-action@87b14cf437d03d37989d87f0fa5ce4f5dc1a330b # v8
+        uses: DeterminateSystems/magic-nix-cache-action@6221693898146dc97e38ad0e013488a16477a4c4 # v9
 
       - name: Prepare Nix shell
         run: nix develop --impure .#ci