diff --git a/.github/workflows/flakehub.yml b/.github/workflows/flakehub.yml
index b60cb3bc..29e11d5e 100644
--- a/.github/workflows/flakehub.yml
+++ b/.github/workflows/flakehub.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: "actions/checkout@v7.0.1"
         with:
           persist-credentials: false
-      - uses: "DeterminateSystems/determinate-nix-action@v3.21.8"
+      - uses: "DeterminateSystems/determinate-nix-action@v3.21.9"
       - uses: "DeterminateSystems/flakehub-push@main"
         with:
           name: "Zoo/cli"
diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index e114fc66..f3ba29e1 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -65,7 +65,7 @@ jobs:
           submodules: recursive
           ref: ${{ github.head_ref }}
 
-      - uses: DeterminateSystems/determinate-nix-action@v3.21.8
+      - uses: DeterminateSystems/determinate-nix-action@v3.21.9
 
       - name: Build and collect hash mismatches
         id: nix_build