diff --git a/.forgejo/workflows/update.yaml b/.forgejo/workflows/update.yaml
new file mode 100644
index 00000000..d76c9622
--- /dev/null
+++ b/.forgejo/workflows/update.yaml
@@ -0,0 +1,21 @@
+name: update-dependencies
+
+on:
+  workflow_dispatch: # allows manual triggering
+  schedule:
+    - cron: '0 0 1 * *' # monthly
+
+jobs:
+  lockfile:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Install Nix
+        uses: cachix/install-nix-action@v31
+      - name: Install npins
+        run: nix profile install 'nixpkgs#npins'
+      - name: Update npins sources
+        uses: getchoo/update-npins@v0
+        with:
+          token: "${{ secrets.DEPLOY_KEY }}"