diff --git a/.github/workflows/update-flake.yaml b/.github/workflows/update-flake.yaml
index 1403966..be55156 100644
--- a/.github/workflows/update-flake.yaml
+++ b/.github/workflows/update-flake.yaml
@@ -22,7 +22,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
 
       - name: Check for Updates
         id: check_updates
@@ -74,7 +74,7 @@ jobs:
           ref: update_flake_lock_action
 
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
 
       - name: Build and Test Configuration
         id: build