diff --git a/src/platform/web/ui/css/timeline.css b/src/platform/web/ui/css/timeline.css
index 1cf7af27..af2d6c14 100644
--- a/src/platform/web/ui/css/timeline.css
+++ b/src/platform/web/ui/css/timeline.css
@@ -63,5 +63,6 @@ limitations under the License.
 }
 
 .Timeline_messageBody img {
-    max-width: 50%;
+    max-width: 400px;
+    max-height: 300px;
 }