diff --git a/src/core_plugins/kibana/public/dashboard/styles/index.less b/src/core_plugins/kibana/public/dashboard/styles/index.less
index f39dba8a9f18e5..651d28f89eb277 100644
--- a/src/core_plugins/kibana/public/dashboard/styles/index.less
+++ b/src/core_plugins/kibana/public/dashboard/styles/index.less
@@ -404,9 +404,13 @@ dashboard-viewport-provider {
 }
 
 .dashboard-viewport {
+  height: 100%;
+  width: 100%;
   background-color: @dashboard-bg;
 }
 .dashboard-viewport-with-margins {
+  height: 100%;
+  width: 100%;
   background-color: @dashboard-bg-with-margins;
 }