diff --git a/README.md b/README.md
index f596073..612bc43 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@
 - --host=[HOSTNAME]
 - --gitbucket.home=[DATA_DIR]
 
-To upgrade GitBucket, only replace gitbucket.war. All GitBucket data is stored in HOME/.gitbucket. So if you want to back up GitBucket data, copy this directory to the other disk.
+To upgrade GitBucket, only replace gitbucket.war after stop GitBucket. All GitBucket data is stored in HOME/.gitbucket. So if you want to back up GitBucket data, copy this directory to the other disk.
 
 For Installation on Windows Server with IIS see [this wiki page](https://github.com/gitbucket/gitbucket/wiki/Installation-on-IIS-and-Helicontech-Zoo)