diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9a468cf..622f370 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: circleci/python:3.5
+      - image: circleci/python:3.6-stretch
 
     working_directory: ~/label-maker
     steps: