diff --git a/.circleci/config.yml b/.circleci/config.yml
index 71893b8..51ea5d8 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,5 +1,5 @@
 ---
-version: 2
+version: 2.1
 
 jobs:
   test: