diff --git a/tests/Aizuchi.Tests.csproj b/tests/Aizuchi.Tests.csproj
index 1fc3533..4ba6627 100644
--- a/tests/Aizuchi.Tests.csproj
+++ b/tests/Aizuchi.Tests.csproj
@@ -6,7 +6,7 @@
     <OutputType>Exe</OutputType>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="TUnit" Version="1.83.0" />
+    <PackageReference Include="TUnit" Version="1.83.8" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="../src/Aizuchi.Core/Aizuchi.Core.csproj" />