diff --git a/src/Data/Url.hs b/src/Data/Url.hs
--- a/src/Data/Url.hs
+++ b/src/Data/Url.hs
@@ -79,7 +79,10 @@
                                                       defaultLiftBaseWith,
                                                       defaultRestoreM)
 import qualified Control.Monad.Trans.Control.Aligned as Aligned
+#if MIN_VERSION_transformers(0,6,0)
+#else
 import           Control.Monad.Trans.Error           (Error, ErrorT)
+#endif
 import           Control.Monad.Trans.Identity        (IdentityT)
 import           Control.Monad.Trans.Maybe           (MaybeT)
 import           Control.Monad.Trans.Resource        (MonadResource (liftResourceT),
@@ -165,11 +168,14 @@
          ) => MonadUrl base (StateT s m) where
   locToUrl     = lift . locToUrl
 
+#if MIN_VERSION_mtl(0,6,0)
+#else
 instance ( MonadUrl base m
          , Monad m
          , Error e
          ) => MonadUrl base (ErrorT e m) where
   locToUrl     = lift . locToUrl
+#endif
 
 instance ( MonadUrl base m
          , Monad m
diff --git a/urlpath.cabal b/urlpath.cabal
--- a/urlpath.cabal
+++ b/urlpath.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 158a46a0005492d4e96f061ea2a1020d6f3e2d9cef1f53450a4414c589be843a
+-- hash: bc836fa8a49a673fab5da2ef5a347bb9928f8406de2ab7213ba3bc9184d0e26a
 
 name:           urlpath
-version:        11.0.1
+version:        11.0.2
 synopsis:       Painfully simple URL deployment.
 description:    Please see the README on Github at <https://github.com/athanclark/urlpath#readme>
 category:       Web, Data