install bundler
diff --git a/publish.sh b/publish.sh
index 8b463f8..39d4626 100755
--- a/publish.sh
+++ b/publish.sh
@@ -50,7 +50,7 @@
 #
 cd master-branch
 echo "Building site..."
-gem install bundler
+gem install bundler -v 1.16.2
 bundle install && bundle exec jekyll build
 if [ $? -ne 0 ]; then
 	echo "Build failed!"