diff --git a/dg.Sql.Connector.PostgreSQL/PostgreSQLConnector.cs b/dg.Sql.Connector.PostgreSQL/PostgreSQLConnector.cs
index 47f3a314..7918da40 100644
--- a/dg.Sql.Connector.PostgreSQL/PostgreSQLConnector.cs
+++ b/dg.Sql.Connector.PostgreSQL/PostgreSQLConnector.cs
@@ -389,10 +389,11 @@ public override string EscapeString(string Value)
             }
         }
 
-        public virtual string PrepareValue(bool Value)
+        public override string PrepareValue(bool Value)
         {
             return Value ? @"TRUE" : @"FALSE";
         }
+
         public override string PrepareValue(Guid Value)
         {
             return '\'' + Value.ToString(@"D") + '\'';