diff --git a/simple_message/include/simple_message/joint_data.h b/simple_message/include/simple_message/joint_data.h
index a625b983..c48b7c9f 100644
--- a/simple_message/include/simple_message/joint_data.h
+++ b/simple_message/include/simple_message/joint_data.h
@@ -154,7 +154,7 @@ class JointData : public industrial::simple_serialize::SimpleSerialize
   /**
    * \brief maximum number of joints positions that can be held in the message.
    */
-  static const industrial::shared_types::shared_int MAX_NUM_JOINTS = 10;
+  static const industrial::shared_types::shared_int MAX_NUM_JOINTS = 20;
   /**
    * \brief internal data buffer
    */