diff --git a/tests/Yoh.Text.Segmentnation.Tests.csproj b/tests/Yoh.Text.Segmentnation.Tests.csproj
index bbcc41a..87991a5 100644
--- a/tests/Yoh.Text.Segmentnation.Tests.csproj
+++ b/tests/Yoh.Text.Segmentnation.Tests.csproj
@@ -4,7 +4,7 @@
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="..\src\Yoh.Text.Segmentation.csproj" />
-    <PackageReference Include="System.Memory" Version="4.6.0" />
+    <PackageReference Include="System.Memory" Version="4.6.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">