diff --git a/Jenkinsfile b/Jenkinsfile
index 69519f3..266165d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -4,7 +4,7 @@ pipeline {
   }
 
   options {
-    buildDiscarder(logRotator(artifactNumToKeepStr: '20'))
+    buildDiscarder(logRotator(numToKeepStr: '30', artifactNumToKeepStr: '20'))
   }
 
   triggers {