diff --git a/src/Yesod/Transloadit.hs b/src/Yesod/Transloadit.hs
--- a/src/Yesod/Transloadit.hs
+++ b/src/Yesod/Transloadit.hs
@@ -36,7 +36,7 @@
 import           Data.Text
 import           Data.Text.Encoding
 import           Data.Time
-import           System.Locale
+import qualified System.Locale as SL
 import           Text.Julius
 import           Yesod                  hiding (Key)
 import           Yesod.Form.Jquery      (YesodJquery (..))
@@ -81,7 +81,7 @@
   parseJSON _ = mzero
 
 formatExpiryTime :: UTCTime -> Text
-formatExpiryTime = pack . formatTime defaultTimeLocale "%Y/%m/%d %H:%M:%S+00:00"
+formatExpiryTime = pack . formatTime SL.defaultTimeLocale "%Y/%m/%d %H:%M:%S+00:00"
 
 instance ToJSON TransloaditParams where
   toJSON (TransloaditParams a (Key k) (Template t) _ _) = object [
diff --git a/yesod-transloadit.cabal b/yesod-transloadit.cabal
--- a/yesod-transloadit.cabal
+++ b/yesod-transloadit.cabal
@@ -1,5 +1,5 @@
 name:                yesod-transloadit
-version:             0.1.1.0
+version:             0.1.2.0
 synopsis:            Transloadit support for Yesod
 description:         Drop in Transloadit capabilites for Yesod web apps
 license:             MIT