diff --git a/graphviz.spec b/graphviz.spec
index e0db732..87dc129 100644
--- a/graphviz.spec
+++ b/graphviz.spec
@@ -43,7 +43,7 @@
 Summary:	Graph visualization tools
 Name:		graphviz
 Version:	10.0.1
-Release:	1
+Release:	2
 License:	Common Public License
 Group:		Graphics
 Url:		http://www.graphviz.org
@@ -80,6 +80,7 @@ BuildRequires:	pkgconfig(librsvg-2.0)
 BuildRequires:	pkgconfig(glut)
 %endif
 Conflicts: %{mklibname graphviz 4} < 2.20.3-3
+Obsoletes: ocaml-graphviz < 10.0.1
 
 %description
 A collection of tools for the manipulation and layout