diff --git a/build/net45.txt b/build/net45.txt
index c24abbc2d8..0f4ac864b2 100644
--- a/build/net45.txt
+++ b/build/net45.txt
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>{Name}</RootNamespace>
     <AssemblyName>{Name}</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <BaseIntermediateOutputPath>obj/net45</BaseIntermediateOutputPath>
   </PropertyGroup>