diff --git a/CHANGELOG.md b/CHANGELOG.md
index 876400bb..c4bc68a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 * [BUGFIX] fix: upstream_protocol reference in auth_orgs #509
 * [ENHANCEMENT] Add `nginx.config.upstream_protocol` field to configure the upstream protocol in the nginx configuration #506
+* [DEPENDENCY] Update quay.io/cortexproject/cortex Docker tag to v1.18.1
 
 ## 2.4.0 / 2024-07-18
 
diff --git a/Chart.yaml b/Chart.yaml
index 747ead07..b4e6c29e 100755
--- a/Chart.yaml
+++ b/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v2
 version: 2.4.0
-appVersion: v1.17.1
+appVersion: v1.18.1
 description: 'Horizontally scalable, highly available, multi-tenant, long term Prometheus.'
 home: https://cortexmetrics.io/
 icon: https://avatars2.githubusercontent.com/u/43045022?s=200&v=4
diff --git a/README.md b/README.md
index bb6351e5..4c2295cb 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 # cortex
 
-![Version: 2.4.0](https://img.shields.io/badge/Version-2.4.0-informational?style=flat-square) ![AppVersion: v1.17.1](https://img.shields.io/badge/AppVersion-v1.17.1-informational?style=flat-square)
+![Version: 2.4.0](https://img.shields.io/badge/Version-2.4.0-informational?style=flat-square) ![AppVersion: v1.18.1](https://img.shields.io/badge/AppVersion-v1.18.1-informational?style=flat-square)
 
 Horizontally scalable, highly available, multi-tenant, long term Prometheus.