diff --git a/Data/Conduit/Process.hs b/Data/Conduit/Process.hs
--- a/Data/Conduit/Process.hs
+++ b/Data/Conduit/Process.hs
@@ -36,7 +36,7 @@
 conduitProcess
   :: MonadResource m
      => CreateProcess
-     -> GConduit S.ByteString m S.ByteString
+     -> Conduit S.ByteString m S.ByteString
 conduitProcess cp = bracketP createp closep $ \(Just cin, Just cout, _, ph) -> do
   end <- repeatLoopT $ do
     -- if process's outputs are available, then yields them.
@@ -80,6 +80,7 @@
       hClose cout
       _ <- waitForProcess' ph
       return ()
+    closep _ = error "Data.Conduit.Process.closep: Unhandled case"
 
     hReady' h =
       hReady h `E.catch` \(E.SomeException _) -> return False
@@ -87,13 +88,13 @@
       waitForProcess ph `E.catch` \(E.SomeException _) -> return ExitSuccess
 
 -- | Source of process
-sourceProcess :: MonadResource m => CreateProcess -> GSource m S.ByteString
-sourceProcess cp = CL.sourceNull >+> conduitProcess cp
+sourceProcess :: MonadResource m => CreateProcess -> Producer m S.ByteString
+sourceProcess cp = toProducer $ CL.sourceNull $= conduitProcess cp
 
 -- | Conduit of shell command
-conduitCmd :: MonadResource m => String -> GConduit S.ByteString m S.ByteString
+conduitCmd :: MonadResource m => String -> Conduit S.ByteString m S.ByteString
 conduitCmd = conduitProcess . shell
 
 -- | Source of shell command
-sourceCmd :: MonadResource m => String -> GSource m S.ByteString
+sourceCmd :: MonadResource m => String -> Producer m S.ByteString
 sourceCmd = sourceProcess . shell
diff --git a/process-conduit.cabal b/process-conduit.cabal
--- a/process-conduit.cabal
+++ b/process-conduit.cabal
@@ -1,5 +1,5 @@
 name:                process-conduit
-version:             0.5.0.5
+version:             1.0.0.0
 synopsis:            Conduits for processes
 
 description:
@@ -33,7 +33,7 @@
                      , bytestring       >= 0.9
                      , text             >= 0.11
                      , process          >= 1.0
-                     , conduit          == 0.5.*
+                     , conduit          == 1.0.*
                      , shakespeare-text >= 1.0
 
   ghc-options:         -Wall