diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 054365336..147d2e903 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -48,7 +48,7 @@ jobs:
         imageName: 'vs2017-win2016'
         python.version: '3.6'
       Python36Mac:
-        imageName: 'macos-10.13'
+        imageName: 'macos-10.14'
         python.version: '3.6'
       # Don't test on 3.7 for now to speed up builds
       # Python37Linux:
@@ -67,7 +67,7 @@ jobs:
         imageName: 'vs2017-win2016'
         python.version: '3.8'
       Python38Mac:
-        imageName: 'macos-10.13'
+        imageName: 'macos-10.14'
         python.version: '3.8'
     maxParallel: 4
   pool: