diff --git a/src/Smdn.Net.MuninNode/Smdn.Net.MuninNode.csproj b/src/Smdn.Net.MuninNode/Smdn.Net.MuninNode.csproj
index 36ec697..6384660 100644
--- a/src/Smdn.Net.MuninNode/Smdn.Net.MuninNode.csproj
+++ b/src/Smdn.Net.MuninNode/Smdn.Net.MuninNode.csproj
@@ -5,7 +5,7 @@ SPDX-License-Identifier: MIT
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>netstandard2.1;net6.0;net8.0</TargetFrameworks>
-    <VersionPrefix>1.2.0</VersionPrefix>
+    <VersionPrefix>1.3.0</VersionPrefix>
     <VersionSuffix></VersionSuffix>
     <PackageValidationBaselineVersion>1.2.0</PackageValidationBaselineVersion>
     <RootNamespace/> <!-- empty the root namespace so that the namespace is determined only by the directory name, for code style rule IDE0030 -->