diff --git a/Reihitsu.Analyzer.Test/Reihitsu.Analyzer.Test.csproj b/Reihitsu.Analyzer.Test/Reihitsu.Analyzer.Test.csproj
index 4eec13a9..d25e5681 100644
--- a/Reihitsu.Analyzer.Test/Reihitsu.Analyzer.Test.csproj
+++ b/Reihitsu.Analyzer.Test/Reihitsu.Analyzer.Test.csproj
@@ -5,7 +5,7 @@
     <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
     <PackageReference Include="MSTest.TestAdapter" Version="4.3.2" />
     <PackageReference Include="MSTest.TestFramework" Version="4.3.2" />
     <PackageReference Include="Microsoft.CodeAnalysis" Version="5.6.0" />