diff --git a/modules/forums/client/less/forum.less b/modules/forums/client/less/forum.less
index deaab36f..e40e2391 100644
--- a/modules/forums/client/less/forum.less
+++ b/modules/forums/client/less/forum.less
@@ -344,6 +344,10 @@
                     margin-right: 15px;
                     margin-bottom: 0;
                 }
+                img {
+                    max-width: 100%;
+                    height: auto;
+                }
             }
         }
         .reply-avatar {