diff --git a/notebook/static/notebook/less/renderedhtml.less b/notebook/static/notebook/less/renderedhtml.less
index d16ef44e7e3..d7023865672 100644
--- a/notebook/static/notebook/less/renderedhtml.less
+++ b/notebook/static/notebook/less/renderedhtml.less
@@ -92,4 +92,8 @@
             max-width: none;
         }
     }
+
+    // Override bootstrap settings, see #1390
+    .alert {margin-bottom: initial;}
+    * + .alert {margin-top: 1em;}
 }