diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2da1e09b..b9ef1869 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: DeterminateSystems/determinate-nix-action@v3.19.0
+      - uses: DeterminateSystems/determinate-nix-action@v3.21.2
       - uses: DeterminateSystems/magic-nix-cache-action@v13
       - run: nix build
 
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: DeterminateSystems/determinate-nix-action@v3.19.0
+      - uses: DeterminateSystems/determinate-nix-action@v3.21.2
       - uses: DeterminateSystems/magic-nix-cache-action@v13
       - run: nix flake check -L --show-trace
 
@@ -61,7 +61,7 @@ jobs:
           cache-from: type=gha
           cache-to: type=gha,mode=max
           load: "true"
-      - uses: DeterminateSystems/determinate-nix-action@v3.19.0
+      - uses: DeterminateSystems/determinate-nix-action@v3.21.2
       - uses: DeterminateSystems/magic-nix-cache-action@v13
       - run: nix develop . --command go test -v ./...
 
diff --git a/.github/workflows/update.yaml b/.github/workflows/update.yaml
index 17467eb7..5e1488f8 100644
--- a/.github/workflows/update.yaml
+++ b/.github/workflows/update.yaml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: DeterminateSystems/determinate-nix-action@v3.19.0
+      - uses: DeterminateSystems/determinate-nix-action@v3.21.2
       - uses: DeterminateSystems/update-flake-lock@5ba4a20ae344a5edd7b97ed3002219974f4d20d7
         with:
           pr-title: Update Nix flake inputs