diff --git a/Jenkinsfile b/Jenkinsfile
index 75ec3d8..846a7f8 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -22,6 +22,7 @@ pipeline{
       steps {
         sh'''
           cd $WORKSPACE
+          [ -d "$WORKSPACE/node_modules" ] && rm -rf "$WORKSPACE/node_modules" || true
           npm install terser
           npm install uglifycss
           npm install typescript