diff --git a/graph-wrapper.cabal b/graph-wrapper.cabal
--- a/graph-wrapper.cabal
+++ b/graph-wrapper.cabal
@@ -1,7 +1,7 @@
 Cabal-Version:      >= 1.8
 Build-Type:         Simple
 Name:               graph-wrapper
-Version:            0.2.5
+Version:            0.2.5.1
 Maintainer:         Max Bolingbroke <batterseapower@hotmail.com>, Sönke Hahn <soenkehahn@gmail.com>
 Homepage:           https://github.com/soenkehahn/graph-wrapper
 License:            BSD3
@@ -36,6 +36,8 @@
         Spec.hs
     build-depends:
         base >= 3.0 && < 5.0,
+        array,
+        containers,
         deepseq,
         hspec,
         QuickCheck