diff --git a/simple-genetic-algorithm.cabal b/simple-genetic-algorithm.cabal
--- a/simple-genetic-algorithm.cabal
+++ b/simple-genetic-algorithm.cabal
@@ -2,7 +2,7 @@
 -- further documentation, see http://haskell.org/cabal/users-guide/
 
 name:                simple-genetic-algorithm
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Simple parallel genetic algorithm implementation
 description:         Simple parallel genetic algorithm implementation
 homepage:            http://eax.me/haskell-genetic-algorithm/
@@ -23,7 +23,7 @@
 library
   exposed-modules:     GA.Simple
   ghc-options:         -O2 -Wall -fno-warn-missing-signatures
-  build-depends:       base >=4.6 && < 4.7,
+  build-depends:       base >=4.5 && < 4.7,
                        random >= 1.0 && < 1.1,
                        parallel >= 3.2 && < 3.3
   hs-source-dirs:      src
@@ -32,7 +32,7 @@
 executable ga-sin-example
   ghc-options:         -O2 -Wall -fno-warn-missing-signatures -threaded -rtsopts
   main-is:             MainSin.hs
-  build-depends:       base >= 4.6 && < 4.7,
+  build-depends:       base >= 4.5 && < 4.7,
                        random >= 1.0 && < 1.1,
                        deepseq >= 1.3 && < 1.4,
                        parallel >= 3.2 && < 3.3
diff --git a/src/GA/Simple.hs b/src/GA/Simple.hs
--- a/src/GA/Simple.hs
+++ b/src/GA/Simple.hs
@@ -11,7 +11,7 @@
 import qualified Data.List as L
 import Control.Parallel.Strategies
 
--- | Chromosome representation
+-- | Chromosome interface
 class NFData a => Chromosome a where
     -- | Crossover function
     crossover :: RandomGen g => g -> a -> a -> ([a],g)
@@ -25,7 +25,7 @@
         => g                        -- ^ Random number generator
         -> Int                      -- ^ Population size
         -> Double                   -- ^ Mutation probability [0, 1]
-        -> (g -> (a, g))            -- ^ Random chromosome generator (hint: use closures)
+        -> (g -> (a, g))            -- ^ Random chromosome generator (hint: use currying or closures)
         -> (a -> Int -> Bool)       -- ^ Stopping criteria, 1st arg - best chromosome, 2nd arg - generation number
         -> a                        -- ^ Best chromosome
 runGA gen ps mp rnd stopf =
@@ -44,7 +44,7 @@
 runGAIO :: Chromosome a
         => Int                      -- ^ Population size
         -> Double                   -- ^ Mutation probability [0, 1]
-        -> (StdGen -> (a, StdGen))  -- ^ Random chromosome generator (hint: use closures)
+        -> (StdGen -> (a, StdGen))  -- ^ Random chromosome generator (hint: use currying or closures)
         -> (a -> Int -> IO Bool)    -- ^ Stopping criteria, 1st arg - best chromosome, 2nd arg - generation number
         -> IO a                     -- ^ Best chromosome
 runGAIO ps mp rnd stopf = do