diff --git a/README.md b/README.md
index d1abca5..2c3a519 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # plugin-retry.js
 
-> Retries requests for server 4xx/5xx responses except `400`, `401`, `403`, `404`, and `422`.
+> Retries requests for server 4xx/5xx responses except `400`, `401`, `403`, `404`, `422`, and `451`.
 
 [![@latest](https://img.shields.io/npm/v/@octokit/plugin-retry.svg)](https://www.npmjs.com/package/@octokit/plugin-retry)
 [![Build Status](https://github.com/octokit/plugin-retry.js/workflows/Test/badge.svg)](https://github.com/octokit/plugin-retry.js/actions?workflow=Test)
diff --git a/src/index.ts b/src/index.ts
index eae8e01..d1b96cf 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -11,7 +11,7 @@ export function retry(octokit: Octokit, octokitOptions: any) {
     {
       enabled: true,
       retryAfterBaseValue: 1000,
-      doNotRetry: [400, 401, 403, 404, 422],
+      doNotRetry: [400, 401, 403, 404, 422, 451],
       retries: 3,
     },
     octokitOptions.retry
diff --git a/test/retry.test.ts b/test/retry.test.ts
index 8365de7..eb94af9 100644
--- a/test/retry.test.ts
+++ b/test/retry.test.ts
@@ -205,10 +205,10 @@ describe("Automatic Retries", function () {
     expect(ms2).toBeGreaterThan(420);
   });
 
-  it("Should not retry 3xx/400/401/403/422 errors", async function () {
+  it("Should not retry 3xx/400/401/403/422/451 errors", async function () {
     const octokit = new TestOctokit({ retry: { retryAfterBaseValue: 50 } });
     let caught = 0;
-    const testStatuses = [304, 400, 401, 403, 404, 422];
+    const testStatuses = [304, 400, 401, 403, 404, 422, 451];
 
     for (const status of testStatuses) {
       try {
@@ -241,7 +241,7 @@ describe("Automatic Retries", function () {
       },
     });
     let caught = 0;
-    const testStatuses = [304, 400, 401, 403, 404];
+    const testStatuses = [304, 400, 401, 403, 404, 422, 451];
 
     for (const status of testStatuses) {
       try {