diff --git a/haskelldb-hdbc-postgresql.cabal b/haskelldb-hdbc-postgresql.cabal
--- a/haskelldb-hdbc-postgresql.cabal
+++ b/haskelldb-hdbc-postgresql.cabal
@@ -1,5 +1,5 @@
 Name: haskelldb-hdbc-postgresql
-Version: 2.1.1
+Version: 2.1.2
 Cabal-version: >= 1.6
 Build-type: Simple
 Homepage: https://github.com/m4dc4p/haskelldb
@@ -14,7 +14,7 @@
 
 Library
   Build-depends: 
-    mtl >= 1 && < 2.1, 
+    mtl >= 1 && < 3, 
     haskelldb >= 2 && < 3,
     haskelldb-hdbc >= 2 && < 3,
     HDBC >= 2 && < 3,