diff --git a/Src/NHibernate.Envers.Tests/Entities/CustomType/PrimitiveTestUserType.cs b/Src/NHibernate.Envers.Tests/Entities/CustomType/PrimitiveTestUserType.cs
index 3590b714..3f86883a 100644
--- a/Src/NHibernate.Envers.Tests/Entities/CustomType/PrimitiveTestUserType.cs
+++ b/Src/NHibernate.Envers.Tests/Entities/CustomType/PrimitiveTestUserType.cs
@@ -33,12 +33,6 @@ public override object Get(DbDataReader rs, int index, ISessionImplementor sessi
 			return PrimitiveImmutableType.Get(value);
 		}
 
-		public override object Get(DbDataReader rs, string name, ISessionImplementor session)
-		{
-			var ordinal = rs.GetOrdinal(name);
-			return Get(rs, ordinal, session);
-		}
-
 		public override string Name => "PrimitiveImmutableType";
 
 		public override System.Type ReturnedClass => typeof(PrimitiveImmutableType);
diff --git a/Src/NHibernate.Envers/Configuration/Fluent/FluentException.cs b/Src/NHibernate.Envers/Configuration/Fluent/FluentException.cs
index 5ab6ac38..c0a6272e 100644
--- a/Src/NHibernate.Envers/Configuration/Fluent/FluentException.cs
+++ b/Src/NHibernate.Envers/Configuration/Fluent/FluentException.cs
@@ -17,9 +17,5 @@ public FluentException(string message) : base(message)
 		public FluentException(string message, Exception inner) : base(message, inner)
 		{
 		}
-
-		protected FluentException(SerializationInfo info, StreamingContext context) : base(info, context)
-		{
-		}
 	}
 }
\ No newline at end of file
diff --git a/Src/NHibernate.Envers/Exceptions/AuditException.cs b/Src/NHibernate.Envers/Exceptions/AuditException.cs
index 5d950db4..f000e669 100644
--- a/Src/NHibernate.Envers/Exceptions/AuditException.cs
+++ b/Src/NHibernate.Envers/Exceptions/AuditException.cs
@@ -19,10 +19,5 @@ public AuditException(string message, Exception innerException)
 						: base(message, innerException)
 		{
 		}
-
-		protected AuditException(SerializationInfo info, StreamingContext context) 
-						: base(info, context)
-	    {
-		}
 	}
 }
diff --git a/Src/NHibernate.Envers/NHibernate.Envers.csproj b/Src/NHibernate.Envers/NHibernate.Envers.csproj
index 50b9b741..9a0756a6 100644
--- a/Src/NHibernate.Envers/NHibernate.Envers.csproj
+++ b/Src/NHibernate.Envers/NHibernate.Envers.csproj
@@ -18,6 +18,6 @@
     <DebugType>Portable</DebugType>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="NHibernate" Version="[5.5.0, 5.6.0)" />
+    <PackageReference Include="NHibernate" Version="[5.6.0, 5.7.0)" />
   </ItemGroup>
 </Project>