diff --git a/Backgammon.Server/Backgammon.Server.csproj b/Backgammon.Server/Backgammon.Server.csproj
index fd54154..60afc17 100644
--- a/Backgammon.Server/Backgammon.Server.csproj
+++ b/Backgammon.Server/Backgammon.Server.csproj
@@ -23,6 +23,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.OpenApi" Version="2.7.5" />
     <PackageReference Include="Microsoft.Orleans.Server" Version="9.*" />
     <PackageReference Include="Microsoft.Orleans.Persistence.AdoNet" Version="9.*" />
     <PackageReference Include="Npgsql" Version="10.*" />