diff --git a/tests/IntegrationTestServer/IntegrationTestServer.csproj b/tests/IntegrationTestServer/IntegrationTestServer.csproj
index 85b003c9..302fcfc0 100644
--- a/tests/IntegrationTestServer/IntegrationTestServer.csproj
+++ b/tests/IntegrationTestServer/IntegrationTestServer.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
     <TargetFramework>net8</TargetFramework>
@@ -13,7 +13,7 @@
   <ItemGroup>
     <PackageReference Include="GraphQL.Server.All" Version="7.4.0" />
     <PackageReference Include="System.Reactive" Version="5.0.0" />
-    <PackageReference Include="System.Reactive.Compatibility" Version="5.0.0" />
+    <PackageReference Include="System.Reactive.Compatibility" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>