diff --git a/.circleci/config.yml b/.circleci/config.yml
index e248c34..ea8d039 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
  build:
   docker:
-    - image: circleci/python:3.6
+    - image: "circleci/python:3.6"
       auth:
        username: mydockerhub_user
        password: DOCKERHUB_PASS