diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3b8f02b..beeb234 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -32,7 +32,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Install Lix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
         with:
           source-url: https://install.lix.systems/lix/lix-installer-${{ matrix.system }}
           logger: pretty
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index f2dda12..6994c98 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Install Lix
-        uses: DeterminateSystems/nix-installer-action@v20
+        uses: DeterminateSystems/nix-installer-action@v21
         with:
           source-url: https://install.lix.systems/lix/lix-installer-x86_64-linux
           logger: pretty