diff --git a/addons/im_chat/static/src/css/im_common.css b/addons/im_chat/static/src/css/im_common.css
index ef13d2a9c0d..c89acb7d6f1 100644
--- a/addons/im_chat/static/src/css/im_common.css
+++ b/addons/im_chat/static/src/css/im_common.css
@@ -29,6 +29,7 @@
     border-top-left-radius: 5px;
     border-top-right-radius: 5px;
     cursor: pointer;
+    z-index:500;
 }
 
 /* conversations */
@@ -46,6 +47,7 @@
     -webkit-box-shadow: 0 0 3px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.3);
     box-shadow: 0 0 3px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.3);
     width: 240px;
+    z-index:500;
 }
 .oe_im_chatview .oe_im_chatview_disconnected {
     display:none;