diff --git a/src/Data/Array/Accelerate/Math/Wigner.hs b/src/Data/Array/Accelerate/Math/Wigner.hs
--- a/src/Data/Array/Accelerate/Math/Wigner.hs
+++ b/src/Data/Array/Accelerate/Math/Wigner.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE FlexibleContexts#-}
+{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE TypeFamilies #-}
 
 -- |
@@ -35,7 +35,7 @@
 -- | Wigner-ville distribution. It takes 1D array of complex floating numbers and returns 2D array of real numbers. 
 --  Columns of result array represents time and rows - frequency. Frequency range is from 0 to n/4, where n is a sampling frequency.
 
-wignerVille :: (A.RealFloat e, Fractional (A.Exp e), Floating (A.Exp e), A.IsFloating e, A.FromIntegral Int e, Elt e, sh ~ DIM2)
+wignerVille :: (A.RealFloat e, A.IsFloating e, A.FromIntegral Int e, Elt e, sh ~ DIM2)
   => sh                                      -- ^ Shape of the data array. It is ignored, when compiled with Native or PTX backend.
   -> A.Acc (A.Array A.DIM1 (ADC.Complex e))  -- ^ Data array
   -> A.Acc (A.Array A.DIM2 e) 
diff --git a/wigner-ville-accelerate.cabal b/wigner-ville-accelerate.cabal
--- a/wigner-ville-accelerate.cabal
+++ b/wigner-ville-accelerate.cabal
@@ -1,5 +1,5 @@
-Name:                   wigner-ville-accelerate
-Version:                0.1.0.1
+Name:                   wigner-ville-accelerate 
+Version:                0.1.0.2
 Cabal-version:          >= 1.6
 Tested-with:            GHC >= 8.0.1
 Build-type:             Simple