diff --git a/package.json b/package.json
index 843b69dc..a25e1795 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "draft-js": "^0.8.1",
     "extract-text-webpack-plugin": "^0.9.1",
     "favico.js": "^0.3.10",
-    "filesize": "^3.1.2",
+    "filesize": "3.5.6",
     "flux": "~2.0.3",
     "gfm.css": "^1.1.1",
     "highlight.js": "^9.0.0",
diff --git a/src/components/views/messages/MessageTimestamp.js b/src/components/views/messages/MessageTimestamp.js
index dda87767..ab910b05 100644
--- a/src/components/views/messages/MessageTimestamp.js
+++ b/src/components/views/messages/MessageTimestamp.js
@@ -25,7 +25,7 @@ module.exports = React.createClass({
     render: function() {
         var date = new Date(this.props.ts);
         return (
-            <span className="mx_MessageTimestamp">
+            <span className="mx_MessageTimestamp" title={ DateUtils.formatDate(date) }>
                 { DateUtils.formatTime(date) }
             </span>
         );