diff --git a/hw-prim.cabal b/hw-prim.cabal
--- a/hw-prim.cabal
+++ b/hw-prim.cabal
@@ -1,5 +1,5 @@
 name:                   hw-prim
-version:                0.0.0.13
+version:                0.0.1.0
 synopsis:               Primitive functions and data types
 description:            Please see README.md
 homepage:               http://github.com/haskell-works/hw-prim#readme
@@ -18,7 +18,7 @@
   hs-source-dirs:       app
   main-is:              Main.hs
   ghc-options:          -threaded -rtsopts -with-rtsopts=-N -Wall -msse4.2
-  build-depends:        base            >= 4       && < 5
+  build-depends:        base
                       , hw-prim
   default-language:     Haskell2010
 
@@ -35,13 +35,13 @@
                       , HaskellWorks.Data.Vector.BoxedVectorLike
                       , HaskellWorks.Data.Vector.StorableVectorLike
                       , HaskellWorks.Data.Vector.VectorLike
-  build-depends:        base                            >= 4.7  && < 5
+  build-depends:        base            >= 4.7       && < 5
                       , vector
                       , bytestring
                       , random
 
   default-language:     Haskell2010
-  ghc-options:          -rtsopts -with-rtsopts=-N -Wall -O2 -msse4.2
+  ghc-options:          -Wall -O2 -msse4.2
 
 test-suite hw-prim-test
   type:                 exitcode-stdio-1.0
@@ -64,7 +64,7 @@
     Main-Is: Main.hs
     GHC-Options: -Wall -O2 -msse4.2
     Default-Language: Haskell2010
-    Build-Depends:      base            >= 4       && < 5
+    Build-Depends:      base
                       , criterion
                       , hw-prim
                       , vector
diff --git a/src/HaskellWorks/Data/Vector/BoxedVectorLike.hs b/src/HaskellWorks/Data/Vector/BoxedVectorLike.hs
--- a/src/HaskellWorks/Data/Vector/BoxedVectorLike.hs
+++ b/src/HaskellWorks/Data/Vector/BoxedVectorLike.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE AllowAmbiguousTypes   #-}
 {-# LANGUAGE FlexibleInstances     #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 
diff --git a/src/HaskellWorks/Data/Vector/StorableVectorLike.hs b/src/HaskellWorks/Data/Vector/StorableVectorLike.hs
--- a/src/HaskellWorks/Data/Vector/StorableVectorLike.hs
+++ b/src/HaskellWorks/Data/Vector/StorableVectorLike.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE AllowAmbiguousTypes   #-}
 {-# LANGUAGE FlexibleInstances     #-}
 {-# LANGUAGE MultiParamTypeClasses #-}