diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 44c981d3..62d527ad 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -7,7 +7,7 @@
   "packages/log-error": "3.1.3",
   "packages/logger": "2.3.0",
   "packages/middleware-log-errors": "3.0.5",
-  "packages/middleware-render-error-info": "3.1.0",
+  "packages/middleware-render-error-info": "4.0.0",
   "packages/serialize-error": "2.2.0",
   "packages/serialize-request": "2.2.1"
 }
\ No newline at end of file
diff --git a/packages/middleware-render-error-info/CHANGELOG.md b/packages/middleware-render-error-info/CHANGELOG.md
index 7e5f5d17..ee6beddb 100644
--- a/packages/middleware-render-error-info/CHANGELOG.md
+++ b/packages/middleware-render-error-info/CHANGELOG.md
@@ -94,6 +94,23 @@
     * @dotcom-reliability-kit/app-info bumped from ^2.1.0 to ^2.2.0
     * @dotcom-reliability-kit/log-error bumped from ^3.1.1 to ^3.1.2
 
+## [4.0.0](https://github.com/Financial-Times/dotcom-reliability-kit/compare/middleware-render-error-info-v3.1.0...middleware-render-error-info-v4.0.0) (2023-11-20)
+
+
+### ⚠ BREAKING CHANGES
+
+* render stripped back errors in production
+
+### Features
+
+* expose error fingerprints as an HTTP header ([2357f2d](https://github.com/Financial-Times/dotcom-reliability-kit/commit/2357f2d92819b753e58c61532652cca0eced3dea))
+* render stripped back errors in production ([d4e1e71](https://github.com/Financial-Times/dotcom-reliability-kit/commit/d4e1e71f7b8f7ff38c0366f24668678589430614))
+
+
+### Bug Fixes
+
+* stop using deprecated `x-` header prefix ([5de9864](https://github.com/Financial-Times/dotcom-reliability-kit/commit/5de9864e5a3b424653bb638207df2c6be763324e))
+
 ## [3.1.0](https://github.com/Financial-Times/dotcom-reliability-kit/compare/middleware-render-error-info-v3.0.4...middleware-render-error-info-v3.1.0) (2023-11-15)
 
 
diff --git a/packages/middleware-render-error-info/package.json b/packages/middleware-render-error-info/package.json
index 82d1fadc..24221921 100644
--- a/packages/middleware-render-error-info/package.json
+++ b/packages/middleware-render-error-info/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@dotcom-reliability-kit/middleware-render-error-info",
-  "version": "3.1.0",
+  "version": "4.0.0",
   "description": "Express middleware to render error information in a way that makes local debugging easier and production error rendering more consistent.",
   "repository": {
     "type": "git",