diff --git a/app/css/app.css b/app/css/app.css
index 37f36ecb..59d0dea9 100644
--- a/app/css/app.css
+++ b/app/css/app.css
@@ -1786,7 +1786,7 @@ span.emoji {
 .im_history_empty {
   text-align: center;
   color: #999;
-  font-size: 18px;
+  font-size: 16px;
   line-height: 18px;
   padding: 1px 50px;
 }