diff --git a/package.json b/package.json
index 230b9f84..0b437a33 100644
--- a/package.json
+++ b/package.json
@@ -32,18 +32,18 @@
   "devDependencies": {
     "closure-builder": "^2.0.17",
     "dialog-polyfill": "^0.4.7",
-    "firebase-tools": "^9.4.0",
+    "firebase-tools": "^11.21.0",
     "fs-extra": "^3.0.1",
     "google-closure-compiler": "^20160713.2.0",
     "google-closure-library": "^20170409.0.0",
     "google-closure-templates": "^20150410.0.0",
-    "gulp": "^3.9.1",
+    "gulp": "^4.0.0",
     "gulp-clean-css": "^2.0.12",
     "gulp-closure-compiler": "^0.4.0",
     "gulp-concat-css": "^2.3.0",
     "gulp-connect": "^5.0.0",
     "gulp-css-flip": "^0.4.0",
-    "gulp-sass": "^2.3.2",
+    "gulp-sass": "^5.0.0",
     "gulp-util": "^3.0.7",
     "material-design-lite": "^1.2.0",
     "phantomjs-prebuilt": "^2.1.13",