diff --git a/components/modal/style/confirm.less b/components/modal/style/confirm.less
index 34bcc26ea4..aa13254389 100644
--- a/components/modal/style/confirm.less
+++ b/components/modal/style/confirm.less
@@ -24,7 +24,7 @@
       color: @heading-color;
       font-weight: 500;
       font-size: @font-size-lg;
-      line-height: 1.375;
+      line-height: 1.4;
       display: block;
       // create BFC to avoid
       // https://user-images.githubusercontent.com/507615/37702510-ba844e06-2d2d-11e8-9b67-8e19be57f445.png