diff --git a/circle.yml b/circle.yml
index 1977fcf45c..2343e14ab4 100644
--- a/circle.yml
+++ b/circle.yml
@@ -4,5 +4,5 @@ machine:
 
 dependencies:
   cache_directories:
-    - node_modules
-    - /usr/local/Cellar
+    - "node_modules"
+    - "/usr/local/Cellar"