diff --git a/scripts/build-js.sh b/scripts/build-js.sh
index c66eae8..203d339 100644
--- a/scripts/build-js.sh
+++ b/scripts/build-js.sh
@@ -3,7 +3,7 @@
 set -e
 
 echo ">> Building Libraries..."
-mkdir static/build/js/lib
+mkdir -p static/build/js/lib
 uglifyjs node_modules/markdown/lib/markdown.js --compress --screw-ie8 --define --stats --keep-fnames -o static/build/js/lib/markdown.js
 uglifyjs node_modules/bootstrap/dist/js/bootstrap.js --compress --screw-ie8 --define --stats --keep-fnames -o static/build/js/lib/bootstrap.js
 uglifyjs static/build/js/lib/* --compress --screw-ie8 --define --stats --keep-fnames -o static/build/js/libs.js