diff --git a/ether.cabal b/ether.cabal
--- a/ether.cabal
+++ b/ether.cabal
@@ -1,9 +1,11 @@
 name:                ether
-version:             0.4.0.0
+version:             0.4.0.1
 synopsis:            Monad transformers and classes
 description:
     Ether is a Haskell library that extends @mtl@ and @transformers@ with
     tagged monad transformers and classes in a compatible way.
+
+    Introduction https://int-index.github.io/ether/
 
 category:            Control
 license:             BSD3
diff --git a/src/Control/Monad/Trans/Ether/Reader.hs b/src/Control/Monad/Trans/Ether/Reader.hs
--- a/src/Control/Monad/Trans/Ether/Reader.hs
+++ b/src/Control/Monad/Trans/Ether/Reader.hs
@@ -53,12 +53,12 @@
 reader _ = pack . Trans.reader
 
 -- | Runs a 'ReaderT' with the given environment
--- and returns the vinal value.
+-- and returns the final value.
 runReaderT :: proxy tag -> ReaderT tag r m a -> r -> m a
 runReaderT _ = Trans.runReaderT . unpack
 
 -- | Runs a 'ReaderT' with the given environment
--- and returns the vinal value.
+-- and returns the final value.
 runReader :: proxy tag -> Reader tag r a -> r -> a
 runReader _ = Trans.runReader . unpack