diff --git a/deploy/edge.js b/deploy/edge.js
index 099f5f1ce..c0f9da72c 100644
--- a/deploy/edge.js
+++ b/deploy/edge.js
@@ -180,7 +180,7 @@ exports.handler = (event, context, callback) => {
   // or if the version number is parsed as an extension.
   let newUri;
 
-  if (parsedPath.ext === '' || /\.[x0-9]{1,}/.test(parsedPath.ext)) {
+  if (parsedPath.ext === '' || /\.(?:x$|[0-9]{1,})/.test(parsedPath.ext)) {
     newUri = path.join(parsedPath.dir, parsedPath.base, indexPath);
   } else {
     newUri = request.uri;