diff --git a/Lombiq.HelpfulLibraries.Tests/Lombiq.HelpfulLibraries.Tests.csproj b/Lombiq.HelpfulLibraries.Tests/Lombiq.HelpfulLibraries.Tests.csproj
index 75a1351e..dd478c7d 100644
--- a/Lombiq.HelpfulLibraries.Tests/Lombiq.HelpfulLibraries.Tests.csproj
+++ b/Lombiq.HelpfulLibraries.Tests/Lombiq.HelpfulLibraries.Tests.csproj
@@ -17,7 +17,7 @@
   </Target>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
     <PackageReference Include="xunit.v3" Version="3.2.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <PrivateAssets>all</PrivateAssets>