diff --git a/package.json b/package.json
index e88e2c8..bd7c95e 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "basic-auth-connect": "^1.0.0",
     "body-parser": "^1.14.1",
     "consolidate": "0.x",
-    "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",