diff --git a/simple-mind-map/src/plugins/RichText.js b/simple-mind-map/src/plugins/RichText.js
index 49d37d00..c50cf303 100644
--- a/simple-mind-map/src/plugins/RichText.js
+++ b/simple-mind-map/src/plugins/RichText.js
@@ -96,8 +96,13 @@ class RichText {
         border: none;
       }
 
+      .smm-richtext-node-wrap {
+        word-break: break-all;
+      }
+
       .smm-richtext-node-wrap p {
         font-family: auto;
+        
       }
 
       .smm-richtext-node-edit-wrap p {