diff --git a/default_environment/stylesheet/main.css b/default_environment/stylesheet/main.css
index 1e4b4bf..00f51d2 100644
--- a/default_environment/stylesheet/main.css
+++ b/default_environment/stylesheet/main.css
@@ -158,6 +158,7 @@ body {
 
       .src_line {
         white-space: pre-wrap;
+        overflow-wrap: anywhere;
       }
     }
   }