diff --git a/.circleci/config.yml b/.circleci/config.yml
index f7f509d7e..01a00d912 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -170,7 +170,7 @@ jobs:
     environment:
       <<: *common_environment
     macos:
-      xcode: "9.3.1"
+      xcode: "9.4.1"
     steps:
       - checkout
       - *init