diff --git a/Numeric/Digamma.hs b/Numeric/Digamma.hs
--- a/Numeric/Digamma.hs
+++ b/Numeric/Digamma.hs
@@ -1,22 +1,3 @@
 module Numeric.Digamma (digamma) where
 
-import Math.Polynomial
-
--- | A robust implementation of the digamma function
--- This code is based on the implementation by Tom Minka
-digamma :: RealFloat a => a -> a
-digamma 0 = -1/0 -- Should we bail here?
-digamma x | x < 0 = let x' = -1*x in digamma (x'+1) + pi / tan (pi*x') -- Use reflection formula
-digamma 1 = -0.5772156649015328606065121 -- Euler-Mascheroni constant
-digamma 2 = pi**2 / 6
-digamma x | x <= small = digamma 1 - 1/x + digamma 2 * x
-          -- Reduce to digamma(x+n) where (x+n) >= large
-          | x > small && x < large = digamma (x+1) - 1/x -- TODO
-  where small = 1e-6
-        large = 9.5
-digamma x = let r = 1/x
-            in log x -  p `evalPoly` (1/x)
-  where p = poly LE [ 0, 1/2, 1/12, 1/120, 1/252, 1/240, 1/132, 691/32760, 1/12, 3617/8160 ]
-{-# SPECIALIZE digamma :: Double -> Double #-}
-{-# SPECIALIZE digamma :: Float -> Float #-}
-
+import Numeric.SpecFunctions (digamma)
diff --git a/digamma.cabal b/digamma.cabal
--- a/digamma.cabal
+++ b/digamma.cabal
@@ -1,8 +1,9 @@
 Name:                digamma
-Version:             0.1
-Synopsis:            A robust implementation of the digamma function
-Description:         An implementation of the digamma function
-                     based on Thomas Minka's Matlab code.
+Version:             1.0
+Synopsis:            A (deprecated) implementation of the digamma function
+Description:
+    /deprecated/ This package has been superceded by
+    'Numeric.SpecFunctions.digamma' from the @math-functions@ package.
 Homepage:            https://github.com/bgamari/digamma
 License:             BSD3
 License-file:        LICENSE
@@ -18,5 +19,5 @@
 
 Library
   Exposed-modules:   Numeric.Digamma
-  Build-depends:     base >= 4 && < 5, polynomial >= 0.6.5 && < 0.7
+  Build-depends:     base >= 4 && < 5, math-functions