diff --git a/README.md b/README.md
index 695d8163e4ecdbe9df34f9e42459f985a4d45576..2e44af76251142ceb0188c8ae49c0fa28c8504d5 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,21 @@ This package file includes a launch file named spawn_sign.launch which is intend
 * **name**: (default=stop1) name given to the traffic sign used to to name the nodes and topics associated with the sign description.
 * **model**: (default=sign) URDF model to use. At the moment only static traffic signs are supported.
 * **tag**: (default=alvar0) Name of the Alvar AR tag used to identify the traffic sign.
-* **type**: (default=stop) Type of the traffic sign. The currently supported types are: giveway, haveway, max_100, max_50, no_entry, no_overtaking, one_way, parking, pedestrian_crossing, roadworks, roundabout, stop, unmarked_intersection and ahead_only.
+* **type**: (default=stop) Type of the traffic sign. The currently supported types are: 
+    * giveway
+    * haveway
+    * max_100
+    * max_50
+    * no_entry
+    * no_overtaking
+    * one_way
+    * parking
+    * pedestrian_crossing
+    * roadworks
+    * roundabout
+    * stop
+    * unmarked_intersection
+    * ahead_only
 * **x** (default=0.0) x position where the traffic sign will placed in the simulated environment with respect to the parent frame.
 * **y** (default=0.0) y position where the traffic sign will placed in the simulated environment with respect to the parent frame.
 * **yaw** (default=0.0) orientation of the traffic sign with respect to the parent frame.