diff --git a/Text/StringPrep.hs b/Text/StringPrep.hs
--- a/Text/StringPrep.hs
+++ b/Text/StringPrep.hs
@@ -9,7 +9,7 @@
 
 import Data.Text (Text)
 import qualified Data.Text as Text
-import Data.Text.ICU.Normalizer (NormalizationMode(NFKC),normalize)
+import Data.Text.ICU.Normalize (NormalizationMode(NFKC),normalize)
 import Data.List.Stream
 import Prelude hiding (any,concatMap,concat,foldr,map)
 import qualified Data.Set as Set
diff --git a/stringprep.cabal b/stringprep.cabal
--- a/stringprep.cabal
+++ b/stringprep.cabal
@@ -1,5 +1,5 @@
 Name: stringprep
-Version: 0.1.2
+Version: 0.1.3
 Description: Implements the "StringPrep" algorithm
 Synopsis: Implements the "StringPrep" algorithm
 License: BSD3
@@ -12,6 +12,6 @@
 extra-source-files: Text/*.hs
 
 Library
- Build-Depends: base, containers>=0.2, ranges>=0.2.2, stream-fusion>=0.1.2.1, text-icu>=0.1, text>=0.1
+ Build-Depends: base>=3 && < 5, containers>=0.2, ranges>=0.2.2, stream-fusion>=0.1.2.1, text-icu>=0.6, text>=0.9
  Exposed-modules: Text.StringPrep, Text.NamePrep
  ghc-options: -O2 -Wall