diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c069a66..f104a6c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ on:
   pull_request:
     branches: [ master ]
   schedule:
-    - cron: '0 0 * * ' # At 00:00 on Monday.
+    - cron: '0 0 * * 1' # At 00:00 on Monday.
 
 jobs:
   test: