diff --git a/src/test/csharp/pgadapter_npgsql_tests/npgsql_tests/npgsql_tests.csproj b/src/test/csharp/pgadapter_npgsql_tests/npgsql_tests/npgsql_tests.csproj
index bffe394ea..dae76cf79 100644
--- a/src/test/csharp/pgadapter_npgsql_tests/npgsql_tests/npgsql_tests.csproj
+++ b/src/test/csharp/pgadapter_npgsql_tests/npgsql_tests/npgsql_tests.csproj
@@ -9,7 +9,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="Npgsql" Version="8.0.5" />
+      <PackageReference Include="Npgsql" Version="9.0.1" />
     </ItemGroup>
 
 </Project>