diff --git a/.circleci/config.yml b/.circleci/config.yml
index 66777904..1ff2edb9 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2
 jobs:
   osx-python3.6:
     macos:
-      xcode: "9.4.1"
+      xcode: 10.2.1
     environment:
       PYTHON: python3
     steps:
diff --git a/.travis.yml b/.travis.yml
index c30a4ab6..51698b97 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,7 @@ jobs:
 
     - name: macOS | x86_64 | Python 3.x
       os: osx
+      osx_image: xcode10.2
       env: PYTHON=python3
 
     - name: Windows | x86_64 | Python 3.6