diff --git a/src/Yesod/Colonnade.hs b/src/Yesod/Colonnade.hs
--- a/src/Yesod/Colonnade.hs
+++ b/src/Yesod/Colonnade.hs
@@ -32,6 +32,8 @@
 import Text.Blaze (Attribute,toValue)
 import Data.Foldable
 import Yesod.Elements (table_,thead_,tbody_,tr_,td_,th_,ul_,li_,a_)
+import Data.Semigroup (Semigroup)
+import qualified Data.Semigroup as SG
 import qualified Text.Blaze.Html5.Attributes as HA
 import qualified Text.Blaze.Html5 as H
 import qualified Colonnade.Encode as E
@@ -53,7 +55,7 @@
   Cell a1 c1 <> Cell a2 c2 = Cell (mappend a1 a2) (mappend c1 c2)
 instance Monoid (Cell site) where
   mempty = Cell mempty mempty
-  mappend = (<>)
+  mappend = (SG.<>)
 
 -- | Create a 'Cell' from a 'Widget'
 cell :: WidgetFor site () -> Cell site
diff --git a/yesod-colonnade.cabal b/yesod-colonnade.cabal
--- a/yesod-colonnade.cabal
+++ b/yesod-colonnade.cabal
@@ -1,6 +1,6 @@
 cabal-version: 2.0
 name: yesod-colonnade
-version: 1.3.0
+version: 1.3.0.1
 synopsis: Helper functions for using yesod with colonnade
 description: Yesod and colonnade
 homepage: https://github.com/andrewthad/colonnade#readme
@@ -17,7 +17,7 @@
   exposed-modules:
     Yesod.Colonnade
   build-depends:
-      base >= 4.9 && < 4.12
+      base >= 4.9.1.0 && < 4.12
     , colonnade >= 1.2 && < 1.3
     , yesod-core >= 1.6 && < 1.7
     , conduit >= 1.3 && < 1.4