diff --git a/.github/workflows/update-code-cursor.yml b/.github/workflows/update-code-cursor.yml
index 60c2367..20b5326 100644
--- a/.github/workflows/update-code-cursor.yml
+++ b/.github/workflows/update-code-cursor.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v5
       - name: Set up Nix
-        uses: DeterminateSystems/nix-installer-action@v19
+        uses: DeterminateSystems/nix-installer-action@v21
       - name: Run updater
         run: |
           set -euxo pipefail
diff --git a/.github/workflows/update-cursor-agent.yml b/.github/workflows/update-cursor-agent.yml
index 8737e3b..dd99ee8 100644
--- a/.github/workflows/update-cursor-agent.yml
+++ b/.github/workflows/update-cursor-agent.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v5
       - name: Set up Nix
-        uses: DeterminateSystems/nix-installer-action@v19
+        uses: DeterminateSystems/nix-installer-action@v21
       - name: Run updater
         run: |
           set -euxo pipefail