diff --git a/libs/matdbg/web/index.html b/libs/matdbg/web/index.html
index d49468873b..3bf2971cad 100644
--- a/libs/matdbg/web/index.html
+++ b/libs/matdbg/web/index.html
@@ -12,6 +12,11 @@
           margin: 0;
           font-family: "Open Sans";
       }
+
+      @font-face {
+        font-family: codicon;
+        src: url(https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.25.2/min/vs/base/browser/ui/codicons/codicon/codicon.ttf);
+      }
     </style>
     <script src="api.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/monaco-editor/0.25.2/min/vs/loader.js"></script>