diff --git a/lib/timeline/component/ItemSet.js b/lib/timeline/component/ItemSet.js
index 5e615b7af..9363ec3fc 100644
--- a/lib/timeline/component/ItemSet.js
+++ b/lib/timeline/component/ItemSet.js
@@ -267,7 +267,7 @@ ItemSet.prototype._create = function(){
   this.hammer.on('panstart', this._onDragStart.bind(this));
   this.hammer.on('panmove',  this._onDrag.bind(this));
   this.hammer.on('panend',   this._onDragEnd.bind(this));
-  this.hammer.get('pan').set({threshold:5, direction: Hammer.DIRECTION_HORIZONTAL});
+  this.hammer.get('pan').set({threshold:5, direction: Hammer.DIRECTION_ALL});
 
   // single select (or unselect) when tapping an item
   this.hammer.on('tap',  this._onSelectItem.bind(this));