diff --git a/.circleci/config.yml b/.circleci/config.yml
index 5d2cfd72..c1203520 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2
 jobs:
   build:
     macos:
-      xcode: "9.0"
+      xcode: "9.4.1"
     working_directory: ~/xcode-install
     shell: /bin/bash --login -eo pipefail
     steps: