diff --git a/src/DayPhaseIndicator.Tests/DayPhaseIndicator.Tests.csproj b/src/DayPhaseIndicator.Tests/DayPhaseIndicator.Tests.csproj
index 400ac6c..01a6ada 100644
--- a/src/DayPhaseIndicator.Tests/DayPhaseIndicator.Tests.csproj
+++ b/src/DayPhaseIndicator.Tests/DayPhaseIndicator.Tests.csproj
@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
   </ItemGroup>