diff --git a/kadai.css b/kadai.css
index 6b1c560..125ad9c 100644
--- a/kadai.css
+++ b/kadai.css
@@ -11,4 +11,4 @@
 .aka{color:#ff0000;}
 .ao{color:#0000ff}
 td,th{border-collapse:separate; border:1px solid  #000000;}
-table{border:double #ff6633 2px ;}
+table{border-collapse:double; border:2px double  #ff6633;}