diff --git a/charts/dial-extension/README.md b/charts/dial-extension/README.md
index d8989ef..a8d8f78 100644
--- a/charts/dial-extension/README.md
+++ b/charts/dial-extension/README.md
@@ -99,7 +99,6 @@ helm install my-release dial/dial-extension -f values.yaml
 | customStartupProbe | object | `{}` | Custom startupProbe that overrides the default one |
 | diagnosticMode.enabled | bool | `false` | Enable diagnostic mode (all probes will be disabled) |
 | env | object | `{}` | Key-value pairs extra environment variables to add to dial-extension |
-| existingConfigmap | string | `nil` | The name of an existing ConfigMap with your custom configuration for container |
 | extraDeploy | list | `[]` | Array of extra objects to deploy with the release |
 | extraEnvVarsSecret | string | `""` | Name of existing Secret containing extra env vars for dial-extension containers |
 | extraVolumeMounts | list | `[]` | Optionally specify extra list of additional volumeMounts for the dial-extension container(s) |
diff --git a/charts/dial-extension/values.yaml b/charts/dial-extension/values.yaml
index 2f968a2..816bb8b 100644
--- a/charts/dial-extension/values.yaml
+++ b/charts/dial-extension/values.yaml
@@ -124,8 +124,6 @@ containerSecurityContext:
   # -- Set dial-extension containers' Security Context runAsNonRoot
   readOnlyRootFilesystem: false
 
-# -- The name of an existing ConfigMap with your custom configuration for container
-existingConfigmap:
 # -- Override default dial-extension command (useful when using custom images)
 command: []
 # -- Override default dial-extension args (useful when using custom images)