diff --git a/package.json b/package.json
index 1f69bec567b..aae429e4ecb 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "express": "^4.12.3",
     "express-ab": "^0.7.0",
     "express-nunjucks": "^2.2.3",
-    "gulp": "^3.9.1",
+    "gulp": "^4.0.0",
     "gulp-autoprefixer": "3.1.1",
     "gulp-cache": "^0.4.1",
     "gulp-cache-bust": "perrygovier/gulp-cache-bust",
@@ -53,7 +53,7 @@
     "gulp-footer": "^1.0.5",
     "gulp-header": "^1.7.1",
     "gulp-if": "^1.2.1",
-    "gulp-imagemin": "^3.3.0",
+    "gulp-imagemin": "^5.0.0",
     "gulp-livereload": "^1.2.0",
     "gulp-load-plugins": "^0.8.0",
     "gulp-minify-css": "^0.3.0",