diff --git a/web/index.html b/web/index.html
index 572c9ce..689a454 100644
--- a/web/index.html
+++ b/web/index.html
@@ -72,7 +72,9 @@
     .view-part-text-plain {
       padding: 0.5em;
       overflow-wrap: break-word;
-      white-space: pre-line;
+      white-space: pre-wrap;
+      word-break: break-word;
+      word-wrap: break-word;
     }
 
     iframe {
@@ -261,7 +263,9 @@
     }
 
     .content-tree {
-      white-space: pre-line;
+      white-space: pre-wrap;
+      word-break: break-word;
+      word-wrap: break-word;
     }
   </style>
 </head>