diff --git a/Hi.WinForm.csproj b/Hi.WinForm.csproj
index b6d5012..8deaa6e 100644
--- a/Hi.WinForm.csproj
+++ b/Hi.WinForm.csproj
@@ -7,7 +7,7 @@
     <RootNamespace>$(AssemblyName)</RootNamespace>
     <Platforms>x64</Platforms>
     <Description>WinForm Display module of HiAPI</Description>
-    <VersionBuild>20</VersionBuild>
+    <VersionBuild>21</VersionBuild>
     <VersionPrefix>1.2.$(VersionBuild)</VersionPrefix>
     <PackageTags>HiAPI</PackageTags>
     <RuntimeIdentifiers>win-x64</RuntimeIdentifiers>