diff --git a/charts/external-dns/CHANGELOG.md b/charts/external-dns/CHANGELOG.md
index 0f31b6bc8..16a129a9a 100644
--- a/charts/external-dns/CHANGELOG.md
+++ b/charts/external-dns/CHANGELOG.md
@@ -22,6 +22,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Update RBAC for `Service` source to support `EndpointSlices`. ([#5493](https://github.com/kubernetes-sigs/external-dns/pull/5493)) _@vflaux_
 
+### Fixed
+
+- Fixed the type of `.extraContainers` from `object` to `list` (array). ([#5564](https://github.com/kubernetes-sigs/external-dns/pull/5564)) _@svengreb_
+
 ## [v1.17.0] - 2025-06-04
 
 ### Changed
diff --git a/charts/external-dns/README.md b/charts/external-dns/README.md
index 0d3e8a044..24f7ed9b3 100644
--- a/charts/external-dns/README.md
+++ b/charts/external-dns/README.md
@@ -105,7 +105,7 @@ If `namespaced` is set to `true`, please ensure that `sources` my only contains
 | env | list | `[]` | [Environment variables](https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/) for the `external-dns` container. |
 | excludeDomains | list | `[]` | Intentionally exclude domains from being managed. |
 | extraArgs | object | `{}` | Extra arguments to provide to _ExternalDNS_. An array or map can be used, with maps allowing for value overrides; maps also support slice values to use the same arg multiple times. |
-| extraContainers | object | `{}` | Extra containers to add to the `Deployment`. |
+| extraContainers | list | `[]` | Extra containers to add to the `Deployment`. |
 | extraVolumeMounts | list | `[]` | Extra [volume mounts](https://kubernetes.io/docs/concepts/storage/volumes/) for the `external-dns` container. |
 | extraVolumes | list | `[]` | Extra [volumes](https://kubernetes.io/docs/concepts/storage/volumes/) for the `Pod`. |
 | fullnameOverride | string | `nil` | Override the full name of the chart. |
diff --git a/charts/external-dns/values.schema.json b/charts/external-dns/values.schema.json
index 51412a627..a4de3f455 100644
--- a/charts/external-dns/values.schema.json
+++ b/charts/external-dns/values.schema.json
@@ -81,7 +81,7 @@
     },
     "extraContainers": {
       "description": "Extra containers to add to the `Deployment`.",
-      "type": "object"
+      "type": "array"
     },
     "extraVolumeMounts": {
       "description": "Extra [volume mounts](https://kubernetes.io/docs/concepts/storage/volumes/) for the `external-dns` container.",
diff --git a/charts/external-dns/values.yaml b/charts/external-dns/values.yaml
index 5ea00c9da..a6fa3212b 100644
--- a/charts/external-dns/values.yaml
+++ b/charts/external-dns/values.yaml
@@ -60,7 +60,7 @@ rbac:  # @schema additionalProperties: true
 deploymentAnnotations: {}
 
 # -- Extra containers to add to the `Deployment`.
-extraContainers: {}
+extraContainers: []
 
 # -- [Deployment Strategy](https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#strategy).
 deploymentStrategy:  # @schema additionalProperties: true