diff --git a/gulpfile.js b/gulpfile.js
index b7a9e442a8c..51536992bd0 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -31,7 +31,7 @@ const execa = require('execa');
 
 var prebid = require('./package.json');
 var dateString = 'Updated : ' + (new Date()).toISOString().substring(0, 10);
-var banner = '/* <%= prebid.name %> v<%= prebid.version %>\n' + dateString + ' */\n';
+var banner = '/* <%= prebid.name %> v<%= prebid.version %>\n' + dateString + '\nModules: <%= modules %> */\n';
 var port = 9999;
 const FAKE_SERVER_HOST = argv.host ? argv.host : 'localhost';
 const FAKE_SERVER_PORT = 4444;
@@ -157,12 +157,13 @@ function makeWebpackPkg() {
 
   const analyticsSources = helpers.getAnalyticsSources();
   const moduleSources = helpers.getModulePaths(externalModules);
+  const modulesString = (externalModules.length > 0) ? externalModules.join(', ') :  'All available modules in current version.';
 
   return gulp.src([].concat(moduleSources, analyticsSources, 'src/prebid.js'))
     .pipe(helpers.nameModules(externalModules))
     .pipe(webpackStream(cloned, webpack))
     .pipe(uglify())
-    .pipe(gulpif(file => file.basename === 'prebid-core.js', header(banner, { prebid: prebid })))
+    .pipe(gulpif(file => file.basename === 'prebid-core.js', header(banner, { prebid: prebid, modules: modulesString })))
     .pipe(gulp.dest('build/dist'));
 }