diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c5b360c..6b5d426 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
 
       - name: Setup Nix cache
         uses: DeterminateSystems/magic-nix-cache-action@v13
@@ -40,7 +40,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
 
       - name: Setup Nix cache
         uses: DeterminateSystems/magic-nix-cache-action@v13
@@ -57,7 +57,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
 
       - name: Setup Nix cache
         uses: DeterminateSystems/magic-nix-cache-action@v13
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 7192a81..50bb3e6 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -19,7 +19,7 @@ jobs:
           fetch-depth: 0
 
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
 
       - name: Setup Nix cache
         uses: DeterminateSystems/magic-nix-cache-action@v13