diff --git a/tools/Dockerfile.ci b/tools/Dockerfile.ci
index a838f3cd5dbc9dbc5256e434c3350f4b620a4aa4..8709075f6cf8f985e346999e76f6b273d7664193 100644
--- a/tools/Dockerfile.ci
+++ b/tools/Dockerfile.ci
@@ -4,7 +4,7 @@ RUN yum -y install wget >/dev/null \
     && yum -y install git openssl-devel curl-devel bzip2-devel python-devel >/dev/null \
     && yum -y install libSM-1.2.2-2.el7.x86_64 --setopt=protected_multilib=false \
     && yum -y install libXrender-0.9.10-1.el7.x86_64 --setopt=protected_multilib=false \
-    yum -y install libXext-1.3.3-3.el7.x86_64 --setopt=protected_multilib=false && \
+    && yum -y install libXext-1.3.3-3.el7.x86_64 --setopt=protected_multilib=false \
     && wget https://cmake.org/files/v3.2/cmake-3.2.0-Linux-x86_64.tar.gz >/dev/null \
     && tar xzf cmake-3.2.0-Linux-x86_64.tar.gz \
     && mv cmake-3.2.0-Linux-x86_64 /usr/local/cmake3.2.0 \