diff --git a/src/less/base/single/input/checkbox.less b/src/less/base/single/input/checkbox.less
index 012e38336..155c14441 100644
--- a/src/less/base/single/input/checkbox.less
+++ b/src/less/base/single/input/checkbox.less
@@ -3,7 +3,7 @@
 .bi-checkbox {
   & .checkbox-content, &.checkbox-content {
     .border-radius(2px);
-    border: 2px solid @color-bi-border-checkbox;
+    border: 1px solid @color-bi-border-checkbox;
     .box-sizing(border-box);
     .transition(all .1s);