diff --git a/pipelineUtilities.psm1 b/pipelineUtilities.psm1
index 33413e476..068bfbe38 100644
--- a/pipelineUtilities.psm1
+++ b/pipelineUtilities.psm1
@@ -51,6 +51,11 @@ function Install-SBOMUtil
 
 $DotnetSDKVersionRequirements = @{
 
+    # .NET SDK 2.1 is required by Authenticode
+    '2.1' = @{
+        MinimalPatch = '818'
+        DefaultPatch = '818'
+    }
     # .NET SDK 3.1 is required by the Microsoft.ManifestTool.dll tool
     '3.1' = @{
         MinimalPatch = '415'