diff --git a/kibana/README.md b/kibana/README.md
index 948e77d74..41472cfd6 100644
--- a/kibana/README.md
+++ b/kibana/README.md
@@ -85,11 +85,11 @@ as a reference. They are also used in the automated testing of this chart.
 | `automountToken`      | Whether or not to automount the service account token in the Pod                                                                                                                               | `true`                             |
 | `elasticsearchHosts`  | The URLs used to connect to Elasticsearch                                                                                                                                                      | `http://elasticsearch-master:9200` |
 | `envFrom`             | Templatable string to be passed to the [environment from variables][] which will be appended to the `envFrom:` definition for the container                                                    | `[]`                               |
-| `extraContainers`     | Templatable string of additional containers to be passed to the `tpl` function                                                                                                                 | `""`                               |
+| `extraContainers`     | Templatable string of additional containers to be passed to the `tpl` function                                                                                                                 | `[]`                               |
 | `extraEnvs`           | Extra [environment variables][] which will be appended to the `env:` definition for the container                                                                                              | see [values.yaml][]                |
-| `extraInitContainers` | Templatable string of additional containers to be passed to the `tpl` function                                                                                                                 | `""`                               |
-| `extraVolumeMounts`   | Configuration for additional `volumeMounts`                                                                                                                                                    | see [values.yaml][]                |
-| `extraVolumes`        | Configuration for additional `volumes`                                                                                                                                                         | see [values.yaml][]                |
+| `extraInitContainers` | Templatable string of additional containers to be passed to the `tpl` function                                                                                                                 | `[]`                               |
+| `extraVolumeMounts`   | Configuration for additional `volumeMounts`                                                                                                                                                    | `[]`                               |
+| `extraVolumes`        | Configuration for additional `volumes`                                                                                                                                                         | `[]`                               |
 | `fullnameOverride`    | Overrides the full name of the resources. If not set the name will default to " `.Release.Name` - `.Values.nameOverride orChart.Name` "                                                        | `""`                               |
 | `healthCheckPath`     | The path used for the readinessProbe to check that Kibana is ready. If you are setting `server.basePath` you will also need to update this to `/${basePath}/app/kibana`                        | `/app/kibana`                      |
 | `hostAliases`         | Configurable [hostAliases][]                                                                                                                                                                   | `[]`                               |
diff --git a/kibana/tests/kibana_test.py b/kibana/tests/kibana_test.py
index 256cbf63a..fd76eb83b 100644
--- a/kibana/tests/kibana_test.py
+++ b/kibana/tests/kibana_test.py
@@ -209,6 +209,22 @@ def test_adding_a_extra_container():
     } in extraContainer
 
 
+def test_adding_a_extra_container_as_yaml():
+    config = """
+extraContainers:
+  - name: do-something
+    image: busybox
+    command: ['do', 'something']
+"""
+    r = helm_template(config)
+    extraContainer = r["deployment"][name]["spec"]["template"]["spec"]["containers"]
+    assert {
+        "name": "do-something",
+        "image": "busybox",
+        "command": ["do", "something"],
+    } in extraContainer
+
+
 def test_adding_a_extra_init_container():
     config = """
 extraInitContainers: |
@@ -227,6 +243,24 @@ def test_adding_a_extra_init_container():
     } in extraInitContainer
 
 
+def test_adding_a_extra_init_container_as_yaml():
+    config = """
+extraInitContainers:
+  - name: do-something
+    image: busybox
+    command: ['do', 'something']
+"""
+    r = helm_template(config)
+    extraInitContainer = r["deployment"][name]["spec"]["template"]["spec"][
+        "initContainers"
+    ]
+    assert {
+        "name": "do-something",
+        "image": "busybox",
+        "command": ["do", "something"],
+    } in extraInitContainer
+
+
 def test_adding_an_ingress_rule():
     config = """
 ingress:
diff --git a/kibana/values.yaml b/kibana/values.yaml
old mode 100755
new mode 100644
index 8f9382efe..ceb7d5729
--- a/kibana/values.yaml
+++ b/kibana/values.yaml
@@ -101,12 +101,13 @@ extraVolumeMounts:
   #   mountPath: /usr/share/extras
   #   readOnly: true
   #
-extraContainers: ""
+
+extraContainers: []
 # - name: dummy-init
 #   image: busybox
 #   command: ['echo', 'hey']
 
-extraInitContainers: ""
+extraInitContainers: []
 # - name: dummy-init
 #   image: busybox
 #   command: ['echo', 'hey']