diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6e69362..e2fddcf 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,6 +2,8 @@ version: 2
 jobs:
   build:
     macos:
+      xcode: "10.2.0"
+
     steps:
       - checkout
       - run: