diff --git a/packages/http-header-normalizer/index.js b/packages/http-header-normalizer/index.js
index 37e171c5f..3cee2189d 100644
--- a/packages/http-header-normalizer/index.js
+++ b/packages/http-header-normalizer/index.js
@@ -67,17 +67,17 @@ const httpHeaderNormalizerMiddleware = (opts = {}) => {
 
   const httpHeaderNormalizerMiddlewareBefore = async (request) => {
     if (request.event.headers) {
-      const rawHeaders = {}
+      // const rawHeaders = {}
       const headers = { ...defaultHeaders }
 
       for (const key of Object.keys(request.event.headers)) {
-        rawHeaders[key] = request.event.headers[key]
+        // rawHeaders[key] = request.event.headers[key]
         headers[options.normalizeHeaderKey(key, options.canonical)] =
           request.event.headers[key]
       }
 
       request.event.headers = headers
-      request.event.rawHeaders = rawHeaders
+      // request.event.rawHeaders = rawHeaders
     }
 
     if (request.event.multiValueHeaders) {
diff --git a/website/docs/middlewares/http-header-normalizer.md b/website/docs/middlewares/http-header-normalizer.md
index 9060eec58..d383fff7b 100644
--- a/website/docs/middlewares/http-header-normalizer.md
+++ b/website/docs/middlewares/http-header-normalizer.md
@@ -13,8 +13,6 @@ Other middlewares like [`jsonBodyParser`](#jsonbodyparser) or [`urlEncodeBodyPar
 will rely on headers to be one of the normalized formats, so if you want to support non-normalized headers in your
 app you have to use this middleware before those ones.
 
-This middleware will copy the original headers in `event.rawHeaders`.
-
 ## Install
 
 To install this middleware you can use NPM:
diff --git a/website/docs/upgrade/5-6.md b/website/docs/upgrade/5-6.md
index 6fafcef69..e42daa60f 100644
--- a/website/docs/upgrade/5-6.md
+++ b/website/docs/upgrade/5-6.md
@@ -63,7 +63,7 @@ No change
 
 ### [http-header-normalizer](/docs/middlewares/http-header-normalizer)
 
-No change
+- `rawHeaders` is no longer attached to `event`. **Breaking Change**
 
 ### [http-json-body-parser](/docs/middlewares/http-json-body-parser)