diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7a70f273..88ff45ec 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: 12.5.1
     environment:
       PYTHON: python3
     steps:
diff --git a/examples/circleci-minimal.yml b/examples/circleci-minimal.yml
index 1ee2ffd7..895b1ed0 100644
--- a/examples/circleci-minimal.yml
+++ b/examples/circleci-minimal.yml
@@ -19,7 +19,7 @@ jobs:
   osx-wheels:
     working_directory: ~/osx-wheels
     macos:
-      xcode: 10.0.0
+      xcode: 12.5.1
     steps:
       - checkout
       - run: