diff --git a/Hi.WinForm.csproj b/Hi.WinForm.csproj
index 35cf49b..637e4f6 100644
--- a/Hi.WinForm.csproj
+++ b/Hi.WinForm.csproj
@@ -7,7 +7,7 @@
     <RootNamespace>$(AssemblyName)</RootNamespace>
     <Platforms>x64</Platforms>
     <Description>WinForm Display module of HiAPI</Description>
-    <VersionBuild>80</VersionBuild>
+    <VersionBuild>81</VersionBuild>
     <VersionPrefix>3.1.$(VersionBuild)</VersionPrefix>
     <PackageTags>HiAPI</PackageTags>
     <RuntimeIdentifiers>win-x64</RuntimeIdentifiers>