diff --git a/phybin.cabal b/phybin.cabal
--- a/phybin.cabal
+++ b/phybin.cabal
@@ -1,5 +1,5 @@
 Name:           phybin
-Version:        0.1.2.4
+Version:        0.1.2.5
 License: BSD3
 License-file:   LICENSE
 Stability: Beta
@@ -11,6 +11,7 @@
 -- 0.1.2   -- first significant release
 -- 0.1.2.1 -- 
 -- 0.1.2.4 -- new release, several new features
+-- 0.1.2.5 -- bump for graphviz API changes
 
 -- homepage: http://code.haskell.org/phybin
 homepage: http://people.csail.mit.edu/newton/phybin/
@@ -40,14 +41,15 @@
 --  Main-is:           Bio/Phylogeny/PhyBin/Main.hs  
   Build-Depends:     base >= 3 && < 5, directory, process, containers, unix, 
                      stringtable-atom, filepath, 
---                     graphviz == 2999.11.0.0,
-                     graphviz >= 2999.12,
+                     -- graphviz == 2999.11.0.0,
+                     -- graphviz >= 2999.12,
+                     -- More API Changes: [2013.07.19]
+                     graphviz >= 2999.16,
                      text >= 0.11 && < 0.12,
                      prettyclass, fgl,
                      HSH, HUnit, bytestring, 
--- For bytestring.lazy support:
+                     -- For bytestring.lazy support:
                      parsec >= 3.1.0 
---                   deepseq,
 --  extensions: CPP
 --   extensions: ScopedTypeVariables, RecordWildCards, TypeSynonymInstances
   GHC-Options: -O2