diff --git a/src/HighTable.css b/src/HighTable.css
index 184b605d..3074f125 100644
--- a/src/HighTable.css
+++ b/src/HighTable.css
@@ -89,7 +89,7 @@
 }
 
 /* row numbers */
-.tbody th:first-child {
+.table tbody th:first-child {
   background-color: #f1f1f3;
   border-right: 1px solid #ddd;
   color: #888;
@@ -104,10 +104,10 @@
   width: 32px;
   cursor: pointer;
 }
-.tbody th:first-child span {
+.table tbody th:first-child span {
   display: inline;
 }
-.tbody th:first-child input {
+.table tbody th:first-child input {
   display: none;
 }
 /* for selected rows, replace row numbers with checkboxes and highlight the rows */