diff --git a/ci/jenkins/Nightly.groovy b/ci/jenkins/Nightly.groovy
index ed327b5d1c..b6286a0aa7 100644
--- a/ci/jenkins/Nightly.groovy
+++ b/ci/jenkins/Nightly.groovy
@@ -3,7 +3,7 @@
 // When scheduling a job that gets automatically triggered by changes,
 // you need to include a [cronjob] tag within the commit message.
 String cron_timezone = 'TZ=Asia/Shanghai'
-String cron_string = BRANCH_NAME == "master" ? "50 1 * * * " : ""
+String cron_string = BRANCH_NAME == "2.3" ? "50 4 * * * " : ""
 
 // Make timeout 4 hours so that we can run two nightly during the ci
 int total_timeout_minutes = 7 * 60