diff --git a/Dockerfile.builder b/Dockerfile.builder
index ab47089..03b4705 100644
--- a/Dockerfile.builder
+++ b/Dockerfile.builder
@@ -22,7 +22,7 @@ RUN set -ex \
 #ENV NPM_CONFIG_LOGLEVEL info
 ENV NODE_VERSION 6.5.0
 
-RUN yum install -y bzip2 git \
+RUN yum install -y bzip2 git fontconfig \
   && curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.xz" \
   && curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
   && gpg --batch --decrypt --output SHASUMS256.txt SHASUMS256.txt.asc \