diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6ebe1cb..836100f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,5 +1,8 @@
-jobs: 
-  build-macos: 
-    macos:  
-      xcode: 11.3.0
-
+version: 2.1
+jobs:
+  build:
+    steps:
+      - checkout # check out the code in the project directory
+      - run: echo "hello world" # run the `echo` command
+    macos:
+      xcode: 10.1.0
\ No newline at end of file