diff --git a/src/sao.less b/src/sao.less
index 06c671c..71cb592 100644
--- a/src/sao.less
+++ b/src/sao.less
@@ -103,6 +103,12 @@
     }
 }
 
+.form-boolean {
+    & input[type=checkbox] {
+        width: initial;
+    }
+}
+
 @media screen and (max-width: 768px) {
     table.responsive,
     table.responsive > thead,