diff --git a/charts/metrics-server/CHANGELOG.md b/charts/metrics-server/CHANGELOG.md
index 5a1fc6056..5a7b3c5ca 100644
--- a/charts/metrics-server/CHANGELOG.md
+++ b/charts/metrics-server/CHANGELOG.md
@@ -19,6 +19,9 @@
 - Fixed nanny's RoleBinding which contained a hard-coded namespace instead of the Helm's release namespace. ([#1479](https://github.com/kubernetes-sigs/metrics-server/pull/1479)) _@
 the-technat_
 
+- ### Changed
+- Updated the _addonResizer_ OCI image to [1.8.21](https://github.com/kubernetes/autoscaler/releases/tag/addon-resizer-1.8.21). _@jimmy-ungerman_
+
 ## [3.12.1] - TBC
 
 ### Changed
diff --git a/charts/metrics-server/README.md b/charts/metrics-server/README.md
index 9783c9669..4b6ce652b 100644
--- a/charts/metrics-server/README.md
+++ b/charts/metrics-server/README.md
@@ -63,7 +63,7 @@ The following table lists the configurable parameters of the _Metrics Server_ ch
 | `addonResizer.enabled`               | If `true`, run the addon-resizer as a sidecar to automatically scale resource requests with cluster size.                                                                                                                                                        | `false`                                                                        |
 | `addonResizer.securityContext`       | Security context for the _metrics_server_container.       |                                                                                                                                             _See values.yaml |
 | `addonResizer.image.repository`      | addon-resizer image repository                                                                                                                                                                                                                                   | `registry.k8s.io/autoscaling/addon-resizer`                                    |
-| `addonResizer.image.tag`             | addon-resizer image tag                                                                                                                                                                                                                                          | `1.8.19`                                                                       |
+| `addonResizer.image.tag`             | addon-resizer image tag                                                                                                                                                                                                                                          | `1.8.21`                                                                       |
 | `addonResizer.resources`             | Resource requests and limits for the _nanny_ container.                                                                                                                                                                                                          | `{ requests: { cpu: 40m, memory: 25Mi }, limits: { cpu: 40m, memory: 25Mi } }` |
 | `addonResizer.nanny.cpu`             | The base CPU requirement.                                                                                                                                                                                                                                        | `0m`                                                                           |
 | `addonResizer.nanny.extraCPU`        | The amount of CPU to add per node.                                                                                                                                                                                                                               | `1m`                                                                           |
diff --git a/charts/metrics-server/values.yaml b/charts/metrics-server/values.yaml
index e35385211..be843db41 100644
--- a/charts/metrics-server/values.yaml
+++ b/charts/metrics-server/values.yaml
@@ -130,7 +130,7 @@ addonResizer:
   enabled: false
   image:
     repository: registry.k8s.io/autoscaling/addon-resizer
-    tag: 1.8.20
+    tag: 1.8.21
   securityContext:
     allowPrivilegeEscalation: false
     readOnlyRootFilesystem: true