diff --git a/Data/CaseInsensitive/Internal.hs b/Data/CaseInsensitive/Internal.hs
--- a/Data/CaseInsensitive/Internal.hs
+++ b/Data/CaseInsensitive/Internal.hs
@@ -1,6 +1,6 @@
-{-# LANGUAGE CPP, NoImplicitPrelude, DeriveDataTypeable #-}
+{-# LANGUAGE CPP, DeriveDataTypeable #-}
 
-#if __GLASGOW_HASKELL__ >= 702
+#if __GLASGOW_HASKELL__ >= 704
 {-# LANGUAGE Unsafe #-}
 #endif
 
diff --git a/Data/CaseInsensitive/Unsafe.hs b/Data/CaseInsensitive/Unsafe.hs
--- a/Data/CaseInsensitive/Unsafe.hs
+++ b/Data/CaseInsensitive/Unsafe.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE CPP, NoImplicitPrelude #-}
 
-#if __GLASGOW_HASKELL__ >= 702
+#if __GLASGOW_HASKELL__ >= 704
 {-# LANGUAGE Unsafe #-}
 #endif
 
diff --git a/case-insensitive.cabal b/case-insensitive.cabal
--- a/case-insensitive.cabal
+++ b/case-insensitive.cabal
@@ -1,5 +1,5 @@
 name:          case-insensitive
-version:       1.2.0.1
+version:       1.2.0.2
 cabal-version: >=1.8
 build-type:    Simple
 license:       BSD3
@@ -25,10 +25,10 @@
 
 Library
   ghc-options: -Wall
-  build-depends: base       >= 3   && < 4.8
+  build-depends: base       >= 3   && < 4.9
                , bytestring >= 0.9 && < 0.11
                , text       >= 0.3 && < 1.3
-               , deepseq    >= 1.1 && < 1.4
+               , deepseq    >= 1.1 && < 1.5
                , hashable   >= 1.0 && < 1.3
   exposed-modules: Data.CaseInsensitive, Data.CaseInsensitive.Unsafe
   other-modules: Data.CaseInsensitive.Internal
@@ -39,7 +39,7 @@
   hs-source-dirs: test
 
   build-depends: case-insensitive
-               , base                 >= 3     && < 4.8
+               , base                 >= 3     && < 4.9
                , bytestring           >= 0.9   && < 0.11
                , text                 >= 0.3   && < 1.3
                , HUnit                >= 1.2.2 && < 1.3
@@ -56,7 +56,7 @@
   ghc-options:    -Wall -O2
 
   build-depends: case-insensitive
-               , base                 >= 3     && < 4.8
+               , base                 >= 3     && < 4.9
                , bytestring           >= 0.9   && < 0.11
                , criterion            >= 0.6.1 && < 1.1
-               , deepseq              >= 1.1   && < 1.4
+               , deepseq              >= 1.1   && < 1.5