diff --git a/packages/api-explorer/src/lib/statuscodes.js b/packages/api-explorer/src/lib/statuscodes.js
index a89dd4009..e7a46eb41 100644
--- a/packages/api-explorer/src/lib/statuscodes.js
+++ b/packages/api-explorer/src/lib/statuscodes.js
@@ -41,9 +41,11 @@ module.exports = function statusCodes(code) {
     420: [420, 'Enhance Your Calm', 'error'],
     422: [422, 'Unprocessable Entity', 'error'],
     423: [423, 'Locked', 'error'],
+    426: [426, 'Upgrade Required', 'error'],
     428: [428, 'Precondition Required', 'error'],
     429: [429, 'Too Many Requests', 'error'],
     431: [431, 'Request Header Fields Too Large', 'error'],
+    451: [451, 'Unavailable For Legal Reasons', 'error'],
     500: [500, 'Internal Server Error', 'error'],
     501: [501, 'Not Implemented', 'error'],
     502: [502, 'Bad Gateway', 'error'],