diff --git a/package.json b/package.json
index 57b4a704..1007b9b7 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "govuk-elements-sass": "alphagov/govuk_elements#v1.1.1",
     "govuk_frontend_toolkit": "^4.6.0",
     "govuk_template_mustache": "^0.16.0",
-    "grunt": "0.4.5",
+    "grunt": "1.0.0",
     "grunt-cli": "0.1.13",
     "grunt-concurrent": "0.4.3",
     "grunt-contrib-watch": "0.5.3",