diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index e28662e..870954b 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -5,6 +5,12 @@ pool:
   vmImage: 'windows-latest'
 
 steps:
+- task: UseDotNet@2
+  displayName: 'Use the .NET Core 2.1 SDK (required for building signing)'
+  inputs:
+    packageType: 'sdk'
+    version: '2.1.x'
+
 - task: UseDotNet@2
   displayName: 'Use the .NET 6 SDK'
   inputs: