diff --git a/extensions/amp-a4a/0.1/amp-a4a.js b/extensions/amp-a4a/0.1/amp-a4a.js
index 09f1343bd38f..01f97f59ac18 100644
--- a/extensions/amp-a4a/0.1/amp-a4a.js
+++ b/extensions/amp-a4a/0.1/amp-a4a.js
@@ -74,7 +74,7 @@ const METADATA_STRING = '<script type="application/json" amp-ad-metadata>';
 // acceptable solution to the 'Safari on iOS doesn't fetch iframe src from
 // cache' issue.  See https://github.com/ampproject/amphtml/issues/5614
 /** @type {string} */
-const SAFEFRAME_VERSION = '1-0-4';
+const SAFEFRAME_VERSION = '1-0-5';
 /** @type {string} @visibleForTesting */
 export const SAFEFRAME_IMPL_PATH =
     'https://tpc.googlesyndication.com/safeframe/' + SAFEFRAME_VERSION +