diff --git a/theme/dt-theme/default/button.less b/theme/dt-theme/default/button.less
index 4bca7452..d0889d6f 100644
--- a/theme/dt-theme/default/button.less
+++ b/theme/dt-theme/default/button.less
@@ -8,6 +8,10 @@
     }
 }
 
+.ant-btn.ant-btn-sm {
+    border-radius: 2px;
+}
+
 .ant-btn.ant-btn-primary {
     text-shadow: unset;
     &:hover, &:focus {