diff --git a/number.cabal b/number.cabal
index 5863169..8fd7761 100644
--- a/number.cabal
+++ b/number.cabal
@@ -28,10 +28,9 @@ library
                      Data.Number.Types,
                      Data.Number.Instances,
                      Data.Number.Internal
-                     Data.Number.Peano
    
   other-extensions:    TypeSynonymInstances, FlexibleInstances
-  build-depends:       base >=4.8 && < 5.0
+  build-depends:       base >=4.8 && < 5.0, natural-numbers
   hs-source-dirs:      src
   default-language:    Haskell2010
-  ghc-options:         -O2
\ No newline at end of file
+  ghc-options:         -O2