diff --git a/Client/Client.csproj b/Client/Client.csproj
index 746444d8..9c02424d 100644
--- a/Client/Client.csproj
+++ b/Client/Client.csproj
@@ -42,7 +42,7 @@
         <PackageReference Include="JsonSubTypes" Version="2.0.1" />
         <PackageReference Include="Microsoft.Extensions.ObjectPool" Version="9.0.0" />
         <PackageReference Include="Microsoft.Net.Http.Headers" Version="2.2.8" />
-        <PackageReference Include="System.Collections.Immutable" Version="8.0.0" />
+        <PackageReference Include="System.Collections.Immutable" Version="9.0.0" />
         <PackageReference Include="System.Configuration.ConfigurationManager" Version="9.0.0" />
         <PackageReference Include="System.Reactive" Version="6.0.1" />
     </ItemGroup>