diff --git a/happstack-foundation.cabal b/happstack-foundation.cabal
--- a/happstack-foundation.cabal
+++ b/happstack-foundation.cabal
@@ -1,5 +1,5 @@
 Name:                happstack-foundation
-Version:             0.5.4
+Version:             0.5.5
 Synopsis:            Glue code for using Happstack with acid-state, web-routes, reform, and HSP
 Description:         happstack-foundation is a library which builds on top of existing components
                      to provide a powerful and type-safe environment for web development. It uses:
@@ -32,7 +32,7 @@
                      hsp                   >= 0.9 && < 0.11,
                      lifted-base           >= 0.1 && < 0.3,
                      monad-control         == 0.3.*,
-                     mtl                   >= 2.0 && < 2.2,
+                     mtl                   >= 2.0 && < 2.3,
                      reform                == 0.2.*,
                      reform-happstack      == 0.2.*,
                      reform-hsp            == 0.2.*,