diff --git a/CHANGELOG.md b/CHANGELOG.md
index bfbb17fb..07bd01eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog
 
+## 0.16.0 (unreleased)
+
 
 ## 0.15.0 (2021-12-05)
 
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 6763de5e..717f256e 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -14,7 +14,7 @@ stages:
               imageName: 'vs2017-win2016'
               rustup_toolchain: stable
             mac-stable:
-              imageName: 'macos-10.15'
+              imageName: 'macos-11'
               rustup_toolchain: stable
             linux-stable:
               imageName: 'ubuntu-20.04'