diff --git a/src/NHibernate.Test/NHibernate.Test.csproj b/src/NHibernate.Test/NHibernate.Test.csproj
index 4bbcba43946..fc81b89538b 100644
--- a/src/NHibernate.Test/NHibernate.Test.csproj
+++ b/src/NHibernate.Test/NHibernate.Test.csproj
@@ -64,7 +64,7 @@
     <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
     <PackageReference Include="FirebirdSql.Data.FirebirdClient" Version="8.5.2" />
-    <PackageReference Include="Npgsql" Version="4.1.9" />
+    <PackageReference Include="Npgsql" Version="6.0.4" />
     <PackageReference Include="MySql.Data" Version="8.0.26" />
   </ItemGroup>
   <ItemGroup Condition="$(NhNetFx)">