diff --git a/IPython/html/static/notebook/less/textcell.less b/IPython/html/static/notebook/less/textcell.less
index d254378..d474969 100644
--- a/IPython/html/static/notebook/less/textcell.less
+++ b/IPython/html/static/notebook/less/textcell.less
@@ -35,6 +35,10 @@ h1,h2,h3,h4,h5,h6 {
     display: none;
 }
 
+.text_cell.rendered .rendered_html {
+    overflow-x: auto;
+}
+
 .text_cell.unrendered .text_cell_render {
     display:none;
 }
diff --git a/IPython/html/static/style/ipython.min.css b/IPython/html/static/style/ipython.min.css
index e13223a..40aae71 100644
--- a/IPython/html/static/style/ipython.min.css
+++ b/IPython/html/static/style/ipython.min.css
@@ -1184,6 +1184,9 @@ h6:hover .anchor-link {
 .text_cell.rendered .input_area {
   display: none;
 }
+.text_cell.rendered .rendered_html {
+  overflow-x: auto;
+}
 .text_cell.unrendered .text_cell_render {
   display: none;
 }
diff --git a/IPython/html/static/style/style.min.css b/IPython/html/static/style/style.min.css
index e14bbe3..5b52663 100644
--- a/IPython/html/static/style/style.min.css
+++ b/IPython/html/static/style/style.min.css
@@ -9976,6 +9976,9 @@ h6:hover .anchor-link {
 .text_cell.rendered .input_area {
   display: none;
 }
+.text_cell.rendered .rendered_html {
+  overflow-x: auto;
+}
 .text_cell.unrendered .text_cell_render {
   display: none;
 }