diff --git a/lib/renderer/web-view/web-view.js b/lib/renderer/web-view/web-view.js
index 4e795f01a5dd..99c737a1448d 100644
--- a/lib/renderer/web-view/web-view.js
+++ b/lib/renderer/web-view/web-view.js
@@ -47,6 +47,7 @@ class WebViewImpl {
   createInternalElement () {
     const iframeElement = document.createElement('iframe')
     iframeElement.style.flex = '1 1 auto'
+    iframeElement.style.width = '100%'
     iframeElement.style.border = '0'
     v8Util.setHiddenValue(iframeElement, 'internal', this)
     return iframeElement