diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
-# Path IO 0.1.0
+## Path IO 0.1.1
+
+* Fixed type signatures of `renameFile` and `copyFile`.
+
+## Path IO 0.1.0
 
 * Initial release.
diff --git a/Path/IO.hs b/Path/IO.hs
--- a/Path/IO.hs
+++ b/Path/IO.hs
@@ -233,8 +233,8 @@
 -- @[ENOTDIR, EISDIR]@
 
 renameDir :: MonadIO m
-  => Path b1 Dir       -- ^ Old name
-  -> Path b2 Dir       -- ^ New name
+  => Path b0 Dir       -- ^ Old name
+  -> Path b1 Dir       -- ^ New name
   -> m ()
 renameDir = liftD2 D.renameDirectory
 
@@ -659,8 +659,8 @@
 -- @[ENOTDIR, EISDIR, EINVAL, EEXIST, ENOTEMPTY]@
 
 renameFile :: MonadIO m
-  => Path b File       -- ^ Original location
-  -> Path b File       -- ^ New location
+  => Path b0 File      -- ^ Original location
+  -> Path b1 File      -- ^ New location
   -> m ()
 renameFile = liftD2 D.renameFile
 
@@ -670,8 +670,8 @@
 -- @old@ are copied to @new@, if possible.
 
 copyFile :: MonadIO m
-  => Path b File       -- ^ Original location
-  -> Path b File       -- ^ Where to put copy
+  => Path b0 File      -- ^ Original location
+  -> Path b1 File      -- ^ Where to put copy
   -> m ()
 copyFile = liftD2 D.copyFile
 
@@ -903,11 +903,12 @@
   -> m a
 liftD2 m a b = liftIO $ m (toFilePath a) (toFilePath b)
 
--- | Similar to 'liftD2', but allows to pass second argument.
+-- | Similar to 'liftD2', but allows to pass second argument of arbitrary
+-- type.
 
 liftD2' :: MonadIO m
   => (FilePath -> v -> IO a) -- ^ Original action
-  -> Path b0 t0        -- ^ First 'Path' argument
+  -> Path b t          -- ^ First 'Path' argument
   -> v                 -- ^ Second argument
   -> m a
 liftD2' m a v = liftIO $ m (toFilePath a) v
diff --git a/path-io.cabal b/path-io.cabal
--- a/path-io.cabal
+++ b/path-io.cabal
@@ -31,7 +31,7 @@
 -- POSSIBILITY OF SUCH DAMAGE.
 
 name:                 path-io
-version:              0.1.0
+version:              0.1.1
 cabal-version:        >= 1.10
 license:              BSD3
 license-file:         LICENSE.md