diff --git a/.github/workflows/flakehub-publish-rolling.yml b/.github/workflows/flakehub-publish-rolling.yml
index 50ccb47..6fd2d0b 100644
--- a/.github/workflows/flakehub-publish-rolling.yml
+++ b/.github/workflows/flakehub-publish-rolling.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: "actions/checkout@v7"
         with:
           persist-credentials: false
-      - uses: "DeterminateSystems/determinate-nix-action@v3"
+      - uses: "DeterminateSystems/determinate-nix-action@v3.21.8"
       - uses: "DeterminateSystems/flakehub-push@main"
         with:
           name: "dwinkler1/nixCatsConfig"
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 3bd7493..58e0d95 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -15,7 +15,7 @@ jobs:
         with:
           hatchet-protocol: 'carve'
       - name: Install Determinate Nix
-        uses: DeterminateSystems/determinate-nix-action@v3
+        uses: DeterminateSystems/determinate-nix-action@v3.21.8
       - uses: cachix/cachix-action@v17
         with:
           name: rde