diff --git a/src/Control/Monad/Trans/Tardis.hs b/src/Control/Monad/Trans/Tardis.hs
--- a/src/Control/Monad/Trans/Tardis.hs
+++ b/src/Control/Monad/Trans/Tardis.hs
@@ -39,8 +39,10 @@
   ) where
 
 import Control.Applicative
+import Control.Monad
 import Control.Monad.Identity
 import Control.Monad.Trans
+import Control.Monad.Fix
 import Control.Monad.Morph
 
 
diff --git a/tardis.cabal b/tardis.cabal
--- a/tardis.cabal
+++ b/tardis.cabal
@@ -1,5 +1,5 @@
 name:                tardis
-version:             0.4.3.0
+version:             0.4.4.0
 synopsis:            Bidirectional state monad transformer
 homepage:            https://github.com/DanBurton/tardis
 bug-reports:         https://github.com/DanBurton/tardis/issues