diff --git a/azure-pipelines.pr.yml b/azure-pipelines.pr.yml
index 64f0892b..4508c40b 100644
--- a/azure-pipelines.pr.yml
+++ b/azure-pipelines.pr.yml
@@ -16,6 +16,12 @@ jobs:
     pool:
       vmImage: 'ubuntu-latest'
     steps:
+      - task: UseDotNet@2
+        displayName: 'Install .net core 3.1'
+        inputs:
+          packageType: 'sdk'
+          version: '3.1.100'
+
       - task: DotNetCoreCLI@2
         displayName: '.NET Core - Restore'
         inputs:
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 29103676..e5d23567 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -19,6 +19,12 @@ jobs:
     pool:
       vmImage: 'ubuntu-latest'
     steps:
+      - task: UseDotNet@2
+        displayName: 'Install .net core 3.1'
+        inputs:
+          packageType: 'sdk'
+          version: '3.1.100'
+
       - task: DotNetCoreCLI@2
         displayName: '.NET Core - Restore'
         inputs: