diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index 12622c3..773867c 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -20,7 +20,7 @@ jobs:
     
     strategy:
       matrix:
-        idf_branch: [release/v3.3]
+        idf_branch: [release/v3.3, release/v4.0]
     steps:
     - uses: actions/checkout@v1
     - name: Install dependencies