diff --git a/.github/workflows/lock.yml b/.github/workflows/lock.yml
new file mode 100644
index 0000000..5377612
--- /dev/null
+++ b/.github/workflows/lock.yml
@@ -0,0 +1,14 @@
+name: Lock Threads
+
+on:
+  schedule:
+    - cron: '0 0 * * Mon'
+
+jobs:
+  lock:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v3
+        with:
+          github-token: ${{ github.token }}
+          issue-lock-inactive-days: '90'