diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 1a51a42..1e0216c 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -9,6 +9,8 @@ jobs:
   nix-flake:
     name: Nix Flake Check
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - name: checkout
         uses: actions/checkout@v4