diff --git a/.circleci/config.yml b/.circleci/config.yml
index e7b09be3..75bd79b7 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -6,7 +6,7 @@ defaults:
       CIRCLE_TEST_REPORTS: /tmp/circleci-test-results
       BUNDLE_PATH: vendor/bundle
     macos:
-      xcode: "9.2.0"
+      xcode: "8.3.3"
     shell: /bin/bash --login -eo pipefail
   - &prepare-storage
     run: