diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5bcd132..ddfec95 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,9 +1,14 @@
 # -----------------------------------------------------------------------------
-#   - invoked on push, pull_request, or manual trigger
+#   - invoked on push, pull_request, manual trigger, or schedule
 #   - test under at least 3 versions of python
 # -----------------------------------------------------------------------------
 name: build
-on: [push, pull_request, workflow_dispatch]
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+  schedule: 
+    - cron: "0 8 * * *"
 
 jobs:
   build: