diff --git a/README.md b/README.md
index 485e812..97024c3 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@ All status codes defined in the following RFCs are supported:
 * RFC6585 (Additional HTTP Status Codes)
 * RFC7538 (Permanent Redirect)
 * RFC8297 (An HTTP Status Code for Indicating Hints)
+* RFC8470 (Using Early Data in HTTP)
 
 TypeScript or JavaScript. Completely library agnostic. No dependencies.
 
@@ -95,6 +96,7 @@ response
 | 422  | UNPROCESSABLE_ENTITY            | Unprocessable Entity            |
 | 423  | LOCKED                          | Locked                          |
 | 424  | FAILED_DEPENDENCY               | Failed Dependency               |
+| 425  | TOO_EARLY                       | Too Early                       |
 | 426  | UPGRADE_REQUIRED                | Upgrade Required                |
 | 428  | PRECONDITION_REQUIRED           | Precondition Required           |
 | 429  | TOO_MANY_REQUESTS               | Too Many Requests               |
diff --git a/codes.json b/codes.json
index fdb3111..dafdddd 100644
--- a/codes.json
+++ b/codes.json
@@ -71,6 +71,15 @@
       "description": "The request failed due to failure of a previous request."
     }
   },
+  {
+    "code": 425,
+    "phrase": "Too Early",
+    "constant": "TOO_EARLY",
+    "comment": {
+      "doc": "Official Documentation @ https://www.rfc-editor.org/rfc/rfc8470#section-5.2",
+      "description": "The server is unwilling to risk processing a request that might be replayed."
+    }
+  },
   {
     "code": 403,
     "phrase": "Forbidden",
diff --git a/src/reason-phrases.ts b/src/reason-phrases.ts
index 1ecb83e..40819dc 100644
--- a/src/reason-phrases.ts
+++ b/src/reason-phrases.ts
@@ -48,6 +48,12 @@ export enum ReasonPhrases {
      * The request failed due to failure of a previous request.
      */
     FAILED_DEPENDENCY = "Failed Dependency",
+    /**
+     * Official Documentation @ https://www.rfc-editor.org/rfc/rfc8470#section-5.2
+     *
+     * The server is unwilling to risk processing a request that might be replayed.
+     */
+    TOO_EARLY = "Too Early",
     /**
      * Official Documentation @ https://tools.ietf.org/html/rfc7231#section-6.5.3
      *
diff --git a/src/status-codes.ts b/src/status-codes.ts
index c20c323..201560a 100644
--- a/src/status-codes.ts
+++ b/src/status-codes.ts
@@ -276,6 +276,12 @@ export enum StatusCodes {
      * The request failed due to failure of a previous request.
      */
     FAILED_DEPENDENCY = 424,
+    /**
+     * Official Documentation @ https://www.rfc-editor.org/rfc/rfc8470#section-5.2
+     *
+     * The server is unwilling to risk processing a request that might be replayed.
+     */
+    TOO_EARLY = 425,
     /**
      * Official Documentation @ https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.15
      *
diff --git a/src/utils.ts b/src/utils.ts
index d70f02d..663f314 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -8,6 +8,7 @@ export const statusCodeToReasonPhrase: Record<string, string> = {
         "201": "Created",
         "417": "Expectation Failed",
         "424": "Failed Dependency",
+        "425": "Too Early",
         "403": "Forbidden",
         "504": "Gateway Timeout",
         "410": "Gone",
@@ -68,6 +69,7 @@ export const reasonPhraseToStatusCode: Record<string, number> = {
         "Created": 201,
         "Expectation Failed": 417,
         "Failed Dependency": 424,
+        "Too Early": 425,
         "Forbidden": 403,
         "Gateway Timeout": 504,
         "Gone": 410,