diff --git a/code-mirror.html b/code-mirror.html
index 8357f66..5b998c5 100644
--- a/code-mirror.html
+++ b/code-mirror.html
@@ -36,7 +36,10 @@
       }
       .CodeMirror {
         position: absolute;
+        top: 0;
+        left: 0;
         height: 100%;
+        width: 100%;
       }
     </style>
   </template>