diff --git a/Dockerfile.tomcat b/Dockerfile.tomcat
index 877c317..e8bb7db 100644
--- a/Dockerfile.tomcat
+++ b/Dockerfile.tomcat
@@ -5,4 +5,5 @@ RUN apt-get update && \
     apt-get install -y --no-install-recommends graphviz fonts-wqy-zenhei && \
     rm -rf /var/lib/apt/lists/*
 
+RUN rm -rf /usr/local/tomcat/webapps/ROOT
 ADD target/plantuml.war /usr/local/tomcat/webapps/ROOT.war