diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
new file mode 100644
index 0000000..9ea9715
--- /dev/null
+++ b/.github/workflows/update.yml
@@ -0,0 +1,18 @@
+name: "Update"
+on:
+  schedule:
+    - cron: "0 4 * * 1,3,6" # Mon, Wed, Sat at 04:00 UTC
+  workflow_dispatch:
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v5
+      - uses: cachix/install-nix-action@v31
+      - run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          nix flake update --commit-lock-file
+          git push