diff --git a/markata/plugins/default_post_template.html b/markata/plugins/default_post_template.html
index 0a893153..efee215b 100644
--- a/markata/plugins/default_post_template.html
+++ b/markata/plugins/default_post_template.html
@@ -422,6 +422,13 @@
   border-radius: 50%;
   }
 
+  main p img {
+    width: 100%;
+    width: -moz-available;
+    width: -webkit-fill-available;
+    width: fill-available;
+  }
+
   </style>
 </head>