diff --git a/gulpfile.js b/gulpfile.js
index 525afb8274e..595ee818e10 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -45,6 +45,10 @@ function runPrettier(command, cb) {
       })
       .join(' ');
 
+    if (!files) {
+      return cb();
+    }
+
     exec(
       `node ./node_modules/.bin/prettier --write --print-width 100 --single-quote --trailing-comma es5 ${files}`,
       function(err, stdout, stderr) {
diff --git a/package-lock.json b/package-lock.json
index 1609ae1d464..26c6aa48376 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1003,7 +1003,7 @@
     },
     "event-stream": {
       "version": "3.3.4",
-      "resolved": "http://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz",
+      "resolved": "https://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz",
       "integrity": "sha1-SrTJoPWlTbkzi0w02Gv86PSzVXE=",
       "dev": true,
       "requires": {