diff --git a/Dockerfile b/Dockerfile
index 546bc20..67c5f0a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -87,8 +87,8 @@ RUN mkdir -p /usr/share/maven /usr/share/maven/ref \
   && rm -f /tmp/apache-maven.tar.gz \
   && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
 
-ENV MAVEN_HOME /usr/share/maven
-ENV MAVEN_CONFIG "$USER_HOME_DIR/.m2"
+ENV MAVEN_HOME=/usr/share/maven
+ENV MAVEN_CONFIG="$USER_HOME_DIR/.m2"
 
 WORKDIR /opt/chen