diff --git a/src/Codec/Binary/UTF8/Light.hs b/src/Codec/Binary/UTF8/Light.hs
--- a/src/Codec/Binary/UTF8/Light.hs
+++ b/src/Codec/Binary/UTF8/Light.hs
@@ -251,15 +251,27 @@
 -- can use Word# literalls
 -- ==> 0xff00ff00##
 encodeUTF8' ((W32# w):xs)
+#if MIN_VERSION_base(4,7,0)
+  | I# (w`ltWord#`(int2Word# 0x80#)) /= 0 =
+#else
   | w`ltWord#`(int2Word# 0x80#) =
+#endif
       [W8# w] : encodeUTF8' xs
+#if MIN_VERSION_base(4,7,0)
+  | I# (w`ltWord#`(int2Word# 0x800#)) /= 0 =
+#else
   | w`ltWord#`(int2Word# 0x800#) =
+#endif
       [ W8#(w`uncheckedShiftRL#`6#
               `or#`(int2Word# 0xc0#))
       , W8#(w`and#`(int2Word# 0x3f#)
               `or#`(int2Word# 0x80#))
       ] : encodeUTF8' xs
+#if MIN_VERSION_base(4,7,0)
+  | I# (w`ltWord#`(int2Word# 0xf0000#)) /= 0 =
+#else
   | w`ltWord#`(int2Word# 0xf0000#) =
+#endif
       [ W8#(w`uncheckedShiftRL#`12#
               `or#`(int2Word# 0xe0#))
       , W8#(w`uncheckedShiftRL#`6#
@@ -268,7 +280,11 @@
       , W8#(w`and#`(int2Word# 0x3f#)
               `or#`(int2Word# 0x80#))
       ] : encodeUTF8' xs
+#if MIN_VERSION_base(4,7,0)
+  | I# (w`ltWord#`(int2Word# 0xe00000#)) /= 0 =
+#else
   | w`ltWord#`(int2Word# 0xe00000#) =
+#endif
       [ W8#(w`uncheckedShiftRL#`18#
               `or#`(int2Word# 0xf0#))
       , W8#(w`uncheckedShiftRL#`12#
diff --git a/utf8-light.cabal b/utf8-light.cabal
--- a/utf8-light.cabal
+++ b/utf8-light.cabal
@@ -1,5 +1,5 @@
 name:               utf8-light
-version:            0.4.0.1
+version:            0.4.1
 cabal-version:      >= 1.6
 build-type:         Simple
 license:            BSD3
@@ -21,4 +21,4 @@
 
 source-repository head
   type:     git
-  location: git://lambda.ath.cx/patrick/utf8-light
+  location: https://github.com/parcs/utf8-light.git