diff --git a/Data/Conduit/Filesystem.hs b/Data/Conduit/Filesystem.hs
--- a/Data/Conduit/Filesystem.hs
+++ b/Data/Conduit/Filesystem.hs
@@ -38,24 +38,21 @@
 -- Note: the option of whether to follow symlinks is currently only checked
 -- on POSIX platforms, as the @Win32@ package does not support querying
 -- symlink status. On Windows, symlinks will always be followed.
-traverse :: C.ResourceIO m
+traverse :: MonadIO m
          => Bool -- ^ Follow directory symlinks (only used on POSIX platforms)
          -> FilePath -- ^ Root directory
          -> C.Source m FilePath
-traverse followSymlinks root = C.Source
-    { C.sourcePull = do
-        seq0 <- liftIO $ listDirectory root
-        pull seq0
-    , C.sourceClose = return ()
-    }
+traverse followSymlinks root = C.SourceM
+    (liftIO (listDirectory root) >>= pull)
+    (return ())
   where
-    mkSrc ps = C.Source (pull ps) (return ())
+    mkSrc ps = C.SourceM (pull ps) (return ())
 
     pull [] = return C.Closed
     pull (p:ps) = do
         isFile' <- liftIO $ isFile p
         if isFile'
-            then return $ C.Open (mkSrc ps) p
+            then return $ C.Open (mkSrc ps) (return ()) p
             else do
                 follow' <- liftIO $ follow p
                 if follow'
@@ -77,13 +74,13 @@
 #endif
 
 -- | Same as 'CB.sourceFile', but uses system-filepath\'s @FilePath@ type.
-sourceFile :: C.ResourceIO m
+sourceFile :: C.MonadResource m
            => FilePath
            -> C.Source m S.ByteString
 sourceFile = CB.sourceFile . encodeString
 
 -- | Same as 'CB.sinkFile', but uses system-filepath\'s @FilePath@ type.
-sinkFile :: C.ResourceIO m
+sinkFile :: C.MonadResource m
          => FilePath
          -> C.Sink S.ByteString m ()
 sinkFile = CB.sinkFile . encodeString
diff --git a/filesystem-conduit.cabal b/filesystem-conduit.cabal
--- a/filesystem-conduit.cabal
+++ b/filesystem-conduit.cabal
@@ -1,5 +1,5 @@
 Name:                filesystem-conduit
-Version:             0.2.0.1
+Version:             0.3.0
 Synopsis:            Use system-filepath data types with conduits.
 Description:         Provides ability to traverse a folder structure efficiently, as well as convenience wrappers for reading from and writing to files.
 License:             BSD3
@@ -21,7 +21,7 @@
                      , system-filepath          >= 0.4.3        && < 0.5
                      , bytestring               >= 0.9
                      , text                     >= 0.11
-                     , conduit                  >= 0.2          && < 0.3
+                     , conduit                  >= 0.3          && < 0.4
   ghc-options:     -Wall
 
   if os(windows)