diff --git a/Dockerfile b/Dockerfile
index a7e4d7b..092c5c7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,7 @@
 ENV MAX_UPLOAD 128M
 ENV PSM_DB_PORT 3306
 ENV UPDATE_INTERVAL 300
+ENV PHPSERVERMON_VER v3.2.2
 
 RUN mkdir /logs /run/nginx
 
@@ -15,6 +16,7 @@
 	&& docker-php-ext-install mysqli pdo_mysql curl xml sockets \
 	&& rm -rf /var/www/* \
     && git clone https://github.com/phpservermon/phpservermon.git ./ \
+    && git checkout tags/$PHPSERVERMON_VER \
     && php composer.phar install \
     && rm -rf Makefile Vagrantfile composer* .git \
     && apk del --purge git libxml2-dev curl-dev