diff --git a/snaplet-postgresql-simple.cabal b/snaplet-postgresql-simple.cabal
--- a/snaplet-postgresql-simple.cabal
+++ b/snaplet-postgresql-simple.cabal
@@ -1,5 +1,5 @@
 name:           snaplet-postgresql-simple
-version:        0.3
+version:        0.3.0.1
 synopsis:       postgresql-simple snaplet for the Snap Framework
 description:    This snaplet contains support for using the Postgresql
                 database with a Snap Framework application via the
@@ -36,7 +36,7 @@
 
   build-depends:
     base                       >= 4       && < 5,
-    bytestring                 >= 0.9.1   && < 0.10,
+    bytestring                 >= 0.9.1   && < 0.11,
     clientsession              >= 0.7.2   && < 0.9,
     configurator               >= 0.2     && < 0.3,
     errors                     >= 1.3     && < 1.4,
diff --git a/src/Snap/Snaplet/Auth/Backends/PostgresqlSimple.hs b/src/Snap/Snaplet/Auth/Backends/PostgresqlSimple.hs
--- a/src/Snap/Snaplet/Auth/Backends/PostgresqlSimple.hs
+++ b/src/Snap/Snaplet/Auth/Backends/PostgresqlSimple.hs
@@ -35,7 +35,7 @@
   ) where
 
 ------------------------------------------------------------------------------
-import           Prelude hiding (catch)
+import           Prelude
 import           Control.Error
 import           Control.Exception (SomeException, catch)
 import qualified Data.Configurator as C
@@ -221,7 +221,7 @@
   {  tblName             = "snap_auth_user"
   ,  colId               = ("uid", "SERIAL PRIMARY KEY")
   ,  colLogin            = ("login", "text UNIQUE NOT NULL")
-  ,  colEmail            = ("email", "text NOT NULL")
+  ,  colEmail            = ("email", "text")
   ,  colPassword         = ("password", "text")
   ,  colActivatedAt      = ("activated_at", "timestamptz")
   ,  colSuspendedAt      = ("suspended_at", "timestamptz")
diff --git a/src/Snap/Snaplet/PostgresqlSimple.hs b/src/Snap/Snaplet/PostgresqlSimple.hs
--- a/src/Snap/Snaplet/PostgresqlSimple.hs
+++ b/src/Snap/Snaplet/PostgresqlSimple.hs
@@ -110,10 +110,9 @@
 
   ) where
 
-import           Prelude hiding (catch)
-
 import           Control.Applicative
-import           Control.Monad.CatchIO hiding (Handler)
+import           Control.Monad.CatchIO (MonadCatchIO)
+import qualified Control.Monad.CatchIO as CIO
 import           Control.Monad.IO.Class
 import           Control.Monad.State
 import           Control.Monad.Trans.Reader
@@ -364,7 +363,7 @@
                     => P.TransactionMode -> m a -> m a
 withTransactionMode mode act = do
     beginMode mode
-    r <- act `onException` rollback
+    r <- act `CIO.onException` rollback
     commit
     return r