diff --git a/packages/theme-saas/src/dialog-box/index.less b/packages/theme-saas/src/dialog-box/index.less
index 7c8f977eac..79f906de3f 100644
--- a/packages/theme-saas/src/dialog-box/index.less
+++ b/packages/theme-saas/src/dialog-box/index.less
@@ -73,6 +73,7 @@
       @apply flex-1;
       @apply font-bold;
       @apply break-all;
+      @apply ~'leading-5.5';
     }
 
     .@{dialog-box-prefix-cls}__headerbtn {