diff --git a/src/lib/Data/Umzug/Core.hs b/src/lib/Data/Umzug/Core.hs
index 18e6005..277fdad 100644
--- a/src/lib/Data/Umzug/Core.hs
+++ b/src/lib/Data/Umzug/Core.hs
@@ -3,6 +3,7 @@
 {-# LANGUAGE OverloadedStrings          #-}
 {-# LANGUAGE RankNTypes                 #-}
 {-# LANGUAGE ScopedTypeVariables        #-}
+{-# LANGUAGE CPP                        #-}
 
 module Data.Umzug.Core
  ( -- * Running migrations
@@ -42,7 +43,9 @@ import           Control.Monad
 import           Control.Monad.Trans.Reader           (ReaderT(runReaderT))
 import           Data.Foldable
 import qualified Data.List as List
+#if !MIN_VERSION_base(4,11,0)
 import           Data.Monoid
+#endif
 import           Data.Text                            (Text)
 import qualified Data.Text                            as T
 import           Data.Time                            (UTCTime)
diff --git a/umzug.cabal b/umzug.cabal
index b27bf88..ba037f4 100644
--- a/umzug.cabal
+++ b/umzug.cabal
@@ -19,7 +19,7 @@ library
   build-depends:
       base (>=4.6 && <5.0)
     , blaze-builder (>=0.3 && <0.5)
-    , postgresql-simple (>=0.5 && <0.6)
+    , postgresql-simple (>=0.5 && <0.7)
     , text (>=0.11 && <1.3)
-    , time (>=1.4 && <1.7)
+    , time (>=1.4 && <1.9)
     , transformers (>=0.3 && < 0.6)