diff --git a/Vp.FSharp.Sql.PostgreSql/PostgreSqlTransaction.fs b/Vp.FSharp.Sql.PostgreSql/PostgreSqlTransaction.fs
index 2da6184..dcd2ce4 100644
--- a/Vp.FSharp.Sql.PostgreSql/PostgreSqlTransaction.fs
+++ b/Vp.FSharp.Sql.PostgreSql/PostgreSqlTransaction.fs
@@ -5,7 +5,7 @@ open Vp.FSharp.Sql
 open Vp.FSharp.Sql.PostgreSql
 
 
-let beginTransactionAsync = Constants.Deps.BeginTransactionAsync
+let private beginTransactionAsync = Constants.Deps.BeginTransactionAsync
 
 let commit cancellationToken isolationLevel connection body =
     Transaction.commit cancellationToken isolationLevel connection beginTransactionAsync body