diff --git a/markup.cabal b/markup.cabal
--- a/markup.cabal
+++ b/markup.cabal
@@ -1,5 +1,5 @@
 Name:                   markup
-Version:                0.0.6
+Version:                0.0.6.1
 Author:                 Athan Clark <athan.clark@gmail.com>
 Maintainer:             Athan Clark <athan.clark@gmail.com>
 License:                MIT
diff --git a/src/Data/Markup/Types.hs b/src/Data/Markup/Types.hs
--- a/src/Data/Markup/Types.hs
+++ b/src/Data/Markup/Types.hs
@@ -61,12 +61,6 @@
   return = InlineMarkupM
   x >>= f = f $ runInlineMarkupM x
 
-instance Monad w => Monoid (InlineMarkupM (w a)) where
-  x `mappend` y = InlineMarkupM $ do
-    runInlineMarkupM x
-    runInlineMarkupM y
-
-
 newtype HostedMarkupM a = HostedMarkupM {runHostedMarkupM :: a}
   deriving (Functor)
 
@@ -81,12 +75,6 @@
   return = HostedMarkupM
   x >>= f = f $ runHostedMarkupM x
 
-instance Monad w => Monoid (HostedMarkupM (w a)) where
-  x `mappend` y = HostedMarkupM $ do
-    runHostedMarkupM x
-    runHostedMarkupM y
-
-
 newtype LocalMarkupM a = LocalMarkupM {runLocalMarkupM :: a}
   deriving (Functor)
 
@@ -100,8 +88,3 @@
 instance Monad LocalMarkupM where
   return = LocalMarkupM
   x >>= f = f $ runLocalMarkupM x
-
-instance Monad w => Monoid (LocalMarkupM (w a)) where
-  x `mappend` y = LocalMarkupM $ do
-    runLocalMarkupM x
-    runLocalMarkupM y