diff --git a/google-server-api.cabal b/google-server-api.cabal
--- a/google-server-api.cabal
+++ b/google-server-api.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: d90c01868fd5ad9fcc24aa1c288d115515bc43534e9f4110da048a8f7500864d
+-- hash: dfb218bddcb334f3b85a53829c1046e9b4769b28d15b15cdbaabfb5e8f2ea1e3
 
 name:           google-server-api
-version:        0.3.2.0
+version:        0.3.2.1
 synopsis:       Google APIs for server to server applications
 description:    This library provides a way to use Google API for server to server applications.
 category:       Web
diff --git a/src/Google/Type.hs b/src/Google/Type.hs
--- a/src/Google/Type.hs
+++ b/src/Google/Type.hs
@@ -23,6 +23,7 @@
 import qualified Data.ByteString.Lazy as LBS
 import Data.Char (toLower)
 import Data.List.NonEmpty (NonEmpty((:|)))
+import Data.Monoid ((<>))
 import Data.Text (Text, intercalate)
 import Data.Typeable (Typeable)
 import GHC.Generics (Generic)