diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29ac6efe..1f5030a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## master / unreleased
 
+* [DEPENDENCY] Update quay.io/cortexproject/cortex Docker tag to v1.20.1 #577
+
 ## 3.0.0 / 2025-11-27
 
 * [CHANGE] Replace bitnami images with community images. Config via .extraEnvVars must be migrated to .args. See memcached docs for standard args. #571
diff --git a/Chart.yaml b/Chart.yaml
index 18551e50..525a5fc3 100755
--- a/Chart.yaml
+++ b/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v2
 version: 3.0.0
-appVersion: v1.20.0
+appVersion: v1.20.1
 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 0278e05d..1a301fbc 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 # cortex
 
-![Version: 3.0.0](https://img.shields.io/badge/Version-3.0.0-informational?style=flat-square) ![AppVersion: v1.20.0](https://img.shields.io/badge/AppVersion-v1.20.0-informational?style=flat-square)
+![Version: 3.0.0](https://img.shields.io/badge/Version-3.0.0-informational?style=flat-square) ![AppVersion: v1.20.1](https://img.shields.io/badge/AppVersion-v1.20.1-informational?style=flat-square)
 
 Horizontally scalable, highly available, multi-tenant, long term Prometheus.