diff --git a/package.json b/package.json
index 307a500..73f65f5 100644
--- a/package.json
+++ b/package.json
@@ -22,18 +22,18 @@
     "govuk_frontend_toolkit": "^4.6.0",
     "govuk_template_jinja": "https://github.com/alphagov/govuk_template/releases/download/v0.16.4/jinja_govuk_template-0.16.4.tgz",
     "govuk_template_mustache": "^0.16.4",
-    "grunt": "0.4.5",
+    "grunt": "1.0.0",
     "grunt-cli": "0.1.13",
     "grunt-concurrent": "0.4.3",
     "grunt-contrib-watch": "0.5.3",
-    "grunt-nodemon": "0.4.0",
-    "grunt-sass": "^1.1.0",
+    "grunt-nodemon": "0.4.1",
+    "grunt-sass": "^3.0.0",
     "grunt-sync": "^0.5.1",
     "hogan.js": "3.0.2",
     "lodash": "^4.6.1",
     "minimist": "0.0.8",
     "portscanner": "^1.0.0",
-    "prompt": "^0.2.14",
+    "prompt": "^1.2.0",
     "readdir": "0.0.6",
     "serve-favicon": "2.3.0"
   }