diff --git a/proxy-mysql/centos/Dockerfile b/proxy-mysql/centos/Dockerfile
index 780ffec07..12cb4f886 100644
--- a/proxy-mysql/centos/Dockerfile
+++ b/proxy-mysql/centos/Dockerfile
@@ -33,7 +33,7 @@ RUN set -eux && \
     yum --quiet makecache && \
     yum -y install epel-release && \
     yum -y install --setopt=tsflags=nodocs \
-            fping
+            fping \
             libcurl \
             libxml2 \
             mariadb \