diff --git a/simple-mind-map/src/plugins/RichText.js b/simple-mind-map/src/plugins/RichText.js
index 5e2b6f1e..94891e64 100644
--- a/simple-mind-map/src/plugins/RichText.js
+++ b/simple-mind-map/src/plugins/RichText.js
@@ -97,6 +97,7 @@ class RichText {
 
       .smm-richtext-node-wrap p {
         font-family: auto;
+        user-select: none;
       }
       `
     )