diff --git a/esqueleto.cabal b/esqueleto.cabal
--- a/esqueleto.cabal
+++ b/esqueleto.cabal
@@ -1,5 +1,5 @@
 name:                esqueleto
-version:             0.2.9
+version:             1.0
 synopsis:            Bare bones, type-safe EDSL for SQL queries on persistent backends.
 homepage:            https://github.com/meteficha/esqueleto
 license:             BSD3
@@ -11,8 +11,6 @@
 build-type:          Simple
 cabal-version:       >=1.8
 description:
-  /This is a preview release./
-  .
   @persistent@ is a library for type-safe data serialization.  It
   has many kinds of backends, such as SQL backends
   (@persistent-mysql@, @persistent-postgresql@,
@@ -57,7 +55,7 @@
   build-depends:
       base                 >= 4.5    && < 4.7
     , text                 == 0.11.*
-    , persistent           >= 1.0.1  && < 1.1
+    , persistent           == 1.1.*
     , transformers         >= 0.2
     , unordered-containers >= 0.2
 
@@ -81,8 +79,8 @@
     , HUnit
     , QuickCheck
     , hspec               == 1.3.*
-    , persistent-sqlite   == 1.0.*
-    , persistent-template == 1.0.*
+    , persistent-sqlite   == 1.1.*
+    , persistent-template == 1.1.*
     , monad-control
     , monad-logger
     , fast-logger         >= 0.2 && < 0.4
diff --git a/src/Database/Esqueleto.hs b/src/Database/Esqueleto.hs
--- a/src/Database/Esqueleto.hs
+++ b/src/Database/Esqueleto.hs
@@ -296,8 +296,10 @@
 
 -- | Synonym for 'Database.Persist.Store.delete' that does not
 -- clash with @esqueleto@'s 'delete'.
-deleteKey :: (PersistStore backend m, PersistEntity val)
-          => Key backend val -> backend m ()
+deleteKey :: ( PersistStore m
+             , PersistMonadBackend m ~ PersistEntityBackend val
+             , PersistEntity val )
+          => Key val -> m ()
 deleteKey = Database.Persist.Store.delete
 
 -- $reexports
diff --git a/src/Database/Esqueleto/Internal/Language.hs b/src/Database/Esqueleto/Internal/Language.hs
--- a/src/Database/Esqueleto/Internal/Language.hs
+++ b/src/Database/Esqueleto/Internal/Language.hs
@@ -263,9 +263,9 @@
   --
   -- @
   -- select $
-  -- from $ \person -> do
+  -- from $ \\person -> do
   -- where_ $ exists $
-  --          from $ \post -> do
+  --          from $ \\post -> do
   --          where_ (post ^. BlogPostAuthorId ==. person ^. PersonId)
   -- return person
   -- @
diff --git a/src/Database/Esqueleto/Internal/Sql.hs b/src/Database/Esqueleto/Internal/Sql.hs
--- a/src/Database/Esqueleto/Internal/Sql.hs
+++ b/src/Database/Esqueleto/Internal/Sql.hs
@@ -49,7 +49,7 @@
 import Database.Persist.EntityDef
 import Database.Persist.GenericSql
 import Database.Persist.GenericSql.Internal (Connection(escapeName, noLimit))
-import Database.Persist.GenericSql.Raw (withStmt, execute)
+import Database.Persist.GenericSql.Raw (execute, SqlBackend, withStmt)
 import Database.Persist.Store hiding (delete)
 import qualified Control.Monad.Trans.Reader as R
 import qualified Control.Monad.Trans.State as S
@@ -83,7 +83,7 @@
 
 -- | Constraint synonym for @persistent@ entities whose backend
 -- is 'SqlPersist'.
-type SqlEntity ent = (PersistEntity ent, PersistEntityBackend ent ~ SqlPersist)
+type SqlEntity ent = (PersistEntity ent, PersistEntityBackend ent ~ SqlBackend)
 
 
 ----------------------------------------------------------------------
@@ -242,7 +242,7 @@
 data OrderByType = ASC | DESC
 
 
-instance Esqueleto SqlQuery SqlExpr SqlPersist where
+instance Esqueleto SqlQuery SqlExpr SqlBackend where
   fromStart = x
     where
       x = do
diff --git a/test/Test.hs b/test/Test.hs
--- a/test/Test.hs
+++ b/test/Test.hs
@@ -544,8 +544,11 @@
 ----------------------------------------------------------------------
 
 
-insert' :: (PersistEntity val, PersistStore (PersistEntityBackend val) m)
-        => val -> PersistEntityBackend val m (Entity val)
+insert' :: ( Functor m
+           , PersistStore m
+           , PersistMonadBackend m ~ PersistEntityBackend val
+           , PersistEntity val )
+        => val -> m (Entity val)
 insert' v = flip Entity v <$> insert v