diff --git a/IPython/html/static/style/ipython.min.css b/IPython/html/static/style/ipython.min.css
index 3335b5d..367bf10 100644
--- a/IPython/html/static/style/ipython.min.css
+++ b/IPython/html/static/style/ipython.min.css
@@ -1727,7 +1727,7 @@ div.cell.text_cell.rendered {
   /* Box - ModalView Body */
   max-height: none !important;
 }
-.widget-container {
+.widget-box {
   /* Box */
   box-sizing: border-box;
   -moz-box-sizing: border-box;
diff --git a/IPython/html/static/style/style.min.css b/IPython/html/static/style/style.min.css
index 2b02974..78642f3 100644
--- a/IPython/html/static/style/style.min.css
+++ b/IPython/html/static/style/style.min.css
@@ -9499,7 +9499,7 @@ div.cell.text_cell.rendered {
   /* Box - ModalView Body */
   max-height: none !important;
 }
-.widget-container {
+.widget-box {
   /* Box */
   box-sizing: border-box;
   -moz-box-sizing: border-box;