diff --git a/apiary-persistent.cabal b/apiary-persistent.cabal
--- a/apiary-persistent.cabal
+++ b/apiary-persistent.cabal
@@ -1,5 +1,5 @@
 name:                apiary-persistent
-version:             1.0.0
+version:             1.1.0
 synopsis:            persistent support for apiary web framework.
 description:
   example: <https://github.com/philopon/apiary/blob/master/examples/persistent.hs>
@@ -12,7 +12,7 @@
 copyright:           (c) 2014 Hirotomo Moriwaki
 category:            Web
 build-type:          Simple
-stability:           experimental
+stability:           stable
 -- extra-source-files:  
 cabal-version:       >=1.10
 
@@ -21,8 +21,8 @@
   build-depends:       base               >=4.6  && <4.8
                      , persistent         >=2.1  && <2.2
 
-                     , apiary             >=1.0  && <1.1
-                     , apiary-logger      >=1.0  && <1.1
+                     , apiary             >=1.1  && <1.2
+                     , apiary-logger      >=1.1  && <1.2
 
                      , resourcet          >=1.1  && <1.2
                      , resource-pool      >=0.2  && <0.3
diff --git a/src/Web/Apiary/Database/Persist.hs b/src/Web/Apiary/Database/Persist.hs
--- a/src/Web/Apiary/Database/Persist.hs
+++ b/src/Web/Apiary/Database/Persist.hs
@@ -52,6 +52,8 @@
     = PersistPool ConnectionPool
     | PersistConn SqlBackend
 
+instance Extension Persist
+
 type With c m = forall a. (c -> m a) -> m a
 
 initPersist' :: (MonadIO n, MonadBaseControl IO n, Monad m)