diff --git a/scripts/nightly.yaml b/scripts/nightly.yaml
index 49d9c8e89..708773f38 100644
--- a/scripts/nightly.yaml
+++ b/scripts/nightly.yaml
@@ -12,7 +12,7 @@ stages:
   - job: MacBuild
     displayName: "macOS Build"
     pool:
-      vmImage: "macOS-11"
+      vmImage: "macOS-latest"
     steps:
     - task: PythonScript@0
       displayName: Build
@@ -41,7 +41,7 @@ stages:
   - job: MacBuildArm64
     displayName: "Mac ARM64 Build"
     pool:
-      vmImage: "macOS-11"
+      vmImage: "macOS-latest"
     steps:
     - script: python scripts/mk_unix_dist.py --dotnet-key=$(Build.SourcesDirectory)/resources/z3.snk --arch=arm64 --os=osx-11.0
     - script: git clone https://github.com/z3prover/z3test z3test