diff --git a/.circleci/config.yml b/.circleci/config.yml
index 408fef721..2d15efd1e 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -170,7 +170,7 @@ jobs:
     environment:
       <<: *common_environment
     macos:
-      xcode: "9.4.1"
+      xcode: "10.3.0"
     steps:
       - checkout
       - *init
diff --git a/.travis.yml b/.travis.yml
index 765fdb14c..d2d92d897 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,7 +22,7 @@ matrix:
           git:
               depth: false
         - os: osx
-          osx_image: xcode9.4
+          osx_image: xcode10.3
 before_install:
     # appdmg doesn't work with old Node.js
     - if [ "$TRAVIS_OS_NAME" = osx ]; then nvm install 10; fi