diff --git a/gogol-core.cabal b/gogol-core.cabal
--- a/gogol-core.cabal
+++ b/gogol-core.cabal
@@ -1,5 +1,5 @@
 name:                  gogol-core
-version:               0.2.0.1
+version:               0.3.0
 synopsis:              Core data types and functionality for Gogol libraries.
 homepage:              https://github.com/brendanhay/gogol
 bug-reports:           https://github.com/brendanhay/gogol/issues
diff --git a/src/Network/Google/Data/Time.hs b/src/Network/Google/Data/Time.hs
--- a/src/Network/Google/Data/Time.hs
+++ b/src/Network/Google/Data/Time.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE OverloadedStrings          #-}
 {-# LANGUAGE DeriveDataTypeable         #-}
 {-# LANGUAGE DeriveGeneric              #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
@@ -22,6 +23,7 @@
     , _Duration
     ) where
 
+import           Data.Monoid                      ((<>))
 import           Control.Lens
 import           Data.Aeson
 import qualified Data.Aeson.Types                  as Aeson
@@ -86,7 +88,7 @@
 instance ToHttpApiData Duration where
     toQueryParam =
           LText.toStrict
-        . Build.toLazyText
+        . (\seconds -> Build.toLazyText seconds <> "s")
         . Sci.formatScientificBuilder Sci.Fixed (Just 9)
         . unDuration