diff --git a/package.json b/package.json
index cf7f865..6fd87f2 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "gulp-cssnano": "^2.1.1",
     "gulp-flatten": "^0.3.0",
     "gulp-if": "^3.0.0",
-    "gulp-iife": "0.3.0",
+    "gulp-iife": "0.4.0",
     "gulp-sass": "^2.2.0",
     "gulp-sourcemaps": "^1.6.0",
     "gulp-uglify": "^3.0.2",