diff --git a/source/Tests/Tests.csproj b/source/Tests/Tests.csproj
index 2011666..d37d5c9 100644
--- a/source/Tests/Tests.csproj
+++ b/source/Tests/Tests.csproj
@@ -12,7 +12,7 @@
     <ProjectReference Include="..\Ocl\Ocl.csproj" />
 
     <PackageReference Include="Octopus.Data" Version="5.3.0" />
-    <PackageReference Include="Octopus.Server.Extensibility" Version="12.1.0" />
+    <PackageReference Include="Octopus.Server.Extensibility" Version="13.0.0" />
     <PackageReference Include="Octopus.TinyTypes" Version="0.1.313" />
     <PackageReference Include="Assent" Version="1.7.0" />
     <PackageReference Include="FluentAssertions" Version="5.10.3" />