diff --git a/reader.html b/reader.html
index 3d7a7fe..3f92619 100644
--- a/reader.html
+++ b/reader.html
@@ -11,6 +11,7 @@ body
     color: #E0E0E0;
     font-family: Verdana, Arial, IPAGothic, Noto Sans CJK JP Regular, TakaoGothic, Meiryo, sans-serif;
     font-size: 1.4em;
+    word-break: break-word;
 }
 html
 {