diff --git a/.github/workflows/test-nix.yml b/.github/workflows/test-nix.yml
index 4bb88e53b84..671c8729d82 100644
--- a/.github/workflows/test-nix.yml
+++ b/.github/workflows/test-nix.yml
@@ -33,7 +33,7 @@ jobs:
           persist-credentials: false
 
       - name: Install nix
-        uses: DeterminateSystems/determinate-nix-action@9adf02b41cfdac2632e1c16f0480ff5bf3b05dd6 # v3.21.1
+        uses: DeterminateSystems/determinate-nix-action@c70cb8ae92d68c66953db28a26a63db1665bc837 # v3.21.5
 
       - name: Setup cachix
         uses: cachix/cachix-action@5f2d7c5294214f71b873db4b969586b980625e71 # v17