diff --git a/src/components/Challenges/index.module.less b/src/components/Challenges/index.module.less
index c238af0..340f470 100644
--- a/src/components/Challenges/index.module.less
+++ b/src/components/Challenges/index.module.less
@@ -127,7 +127,7 @@
   :global {
     .subql-markdown-preview {
       * {
-        word-break: break-all;
+        word-break: break-word;
         overflow-wrap: anywhere;
       }
     }