diff --git a/package.json b/package.json
index 57b4a704..c6ebdfbc 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "browser-sync": "^2.11.1",
     "consolidate": "0.x",
     "cson": "^3.0.2",
-    "express": "4.13.3",
+    "express": "4.20.0",
     "express-nunjucks": "^0.9.3",
     "express-writer": "0.0.4",
     "govuk-elements-sass": "alphagov/govuk_elements#v1.1.1",