diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 593acd2..0367dba 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,6 +6,8 @@ on:
     paths:
       - "**.rs"
       - "Cargo.toml"
+  schedule:
+    - cron: '0 0 1 * *'  # once a month
 
 env:
   CARGO_TERM_COLOR: always