diff --git a/.circleci/wkhtmltopdf.sh b/.circleci/wkhtmltopdf.sh
index 8d3df9b..27085fe 100755
--- a/.circleci/wkhtmltopdf.sh
+++ b/.circleci/wkhtmltopdf.sh
@@ -4,7 +4,7 @@
 
 set -e
 
-apt-get install wkhtmltopdf xvfb
+apt-get install wkhtmltopdf xvfb -y
 echo -e '#!/bin/bash\nxvfb-run -a --server-args="-screen 0, 1024x768x24" /usr/bin/wkhtmltopdf -q $*' > /usr/bin/wkhtmltopdf.sh
 chmod a+x /usr/bin/wkhtmltopdf.sh
 ln -s /usr/bin/wkhtmltopdf.sh /usr/local/bin/wkhtmltopdf