diff --git a/.circleci/config.yml b/.circleci/config.yml
index 5819fda..25b8f48 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -11,7 +11,7 @@ jobs:
       - save_cache:
           key: dependency-cache
           path: 
-            - ~/cmake-3.11.0-Linux-x86_64
+            - "~/cmake-3.11.0-Linux-x86_64"
       - run: sudo add-apt-repository -y ppa:jonathonf/gcc-7.1
       - run: sudo apt-get update
       - run: sudo apt-get install gcc-7 g++-7