diff --git a/stack.xml b/stack.xml
index a7ef693..346e9aa 100644
--- a/stack.xml
+++ b/stack.xml
@@ -1,6 +1,6 @@
 <stack>
   <name>robot_model</name>
-  <version>1.9.10</version>
+  <version>1.9.11</version>
   <description brief="Modeling robot information">
     <tt>robot_model</tt> contains packages for modeling various
     aspects of robot information, specified in the Xml Robot
@@ -34,6 +34,7 @@
   <build_depends>urdfdom_headers</build_depends>
   <build_depends>collada-dev</build_depends>
   <build_depends>convex_decomposition</build_depends>
+  <build_depends>ivcon</build_depends>
 
   <depends>common_msgs</depends>
   <depends>orocos_kdl</depends> 
@@ -49,5 +50,6 @@
   <depends>urdfdom_headers</depends>
   <depends>collada-dev</depends>
   <depends>convex_decomposition</depends>
+  <depends>ivcon</depends>
 
 </stack>