diff --git a/period.cabal b/period.cabal
--- a/period.cabal
+++ b/period.cabal
@@ -1,5 +1,5 @@
 name:                period
-version:             0.1.0.2
+version:             0.1.0.3
 synopsis:            Parse and format date periods, collapse and expand their text representations.
 -- description:         
 homepage:            https://github.com/w3rs/period
diff --git a/src/Text/Period.hs b/src/Text/Period.hs
--- a/src/Text/Period.hs
+++ b/src/Text/Period.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP                   #-}
 {-# LANGUAGE ConstraintKinds       #-}
 {-# LANGUAGE FlexibleContexts      #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
@@ -10,15 +11,21 @@
  , formatPeriod, collapsePeriod
  )where
 
-import System.Locale (defaultTimeLocale)
-
 import           Control.Applicative hiding ((<|>))
 import           Control.Arrow
 import           Control.Monad
 import           Data.Char
 import           Data.Monoid         ((<>))
 import qualified Data.Text           as T
-import           Data.Time hiding (defaultTimeLocale)
+
+#if MIN_VERSION_time(1, 5, 0)
+import Data.Time (defaultTimeLocale)
+#else
+import System.Locale (defaultTimeLocale)
+#endif
+
+import Data.Time.Calendar
+import Data.Time (formatTime)
 
 import Prelude
 import TextShow (showt)