diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a27ef68..c989c46 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,10 @@
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  schedule:
+    - cron: '17 12 * * 6'
 
 name: ci
 jobs: