diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 7039ad9227..603308ef9a 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -34,6 +34,9 @@ jobs:
   pool:
     vmImage: 'macOS-10.14'
   steps:
+  - task: DotNetCoreInstaller@0
+    inputs:
+      version: '2.1.403'
 
   - task: CmdLine@2
     displayName: 'Install Mono 5.18'