diff --git a/.changeset/tough-oranges-judge.md b/.changeset/tough-oranges-judge.md
new file mode 100644
index 000000000..61ab7de08
--- /dev/null
+++ b/.changeset/tough-oranges-judge.md
@@ -0,0 +1,5 @@
+---
+"openapi-typescript-helpers": patch
+---
+
+adds 500-511 error status codes
diff --git a/packages/openapi-typescript-helpers/index.d.ts b/packages/openapi-typescript-helpers/index.d.ts
index 51f88bf5c..ce57c4297 100644
--- a/packages/openapi-typescript-helpers/index.d.ts
+++ b/packages/openapi-typescript-helpers/index.d.ts
@@ -7,7 +7,7 @@ export type HttpMethod = "get" | "put" | "post" | "delete" | "options" | "head"
 export type OkStatus = 200 | 201 | 202 | 203 | 204 | 206 | 207 | "2XX";
 // prettier-ignore
 /** 4XX and 5XX statuses */
-export type ErrorStatus = 500 | '5XX' | 400 | 401 | 402 | 403 | 404 | 405 | 406 | 407 | 408 | 409 | 410 | 411 | 412 | 413 | 414 | 415 | 416 | 417 | 418 | 420 | 421 | 422 | 423 | 424 | 425 | 426 | 429 | 431 | 444 | 450 | 451 | 497 | 498 | 499 | '4XX' | "default";
+export type ErrorStatus = 500 | 501 | 502 | 503 | 504 | 505 | 506 | 507 | 508 | 510 | 511 | '5XX' | 400 | 401 | 402 | 403 | 404 | 405 | 406 | 407 | 408 | 409 | 410 | 411 | 412 | 413 | 414 | 415 | 416 | 417 | 418 | 420 | 421 | 422 | 423 | 424 | 425 | 426 | 429 | 431 | 444 | 450 | 451 | 497 | 498 | 499 | '4XX' | "default";
 
 // OpenAPI type helpers