diff --git a/.github/workflows/lockthreads.yml b/.github/workflows/lockthreads.yml
new file mode 100644
index 0000000000..11e571abf6
--- /dev/null
+++ b/.github/workflows/lockthreads.yml
@@ -0,0 +1,14 @@
+name: 'Lock threads'
+
+on:
+  schedule:
+    - cron: '0 18 * * *'
+
+jobs:
+  lock:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v2
+        with:
+          github-token: ${{ github.token }}
+          pr-lock-inactive-days: '90'