diff --git a/binderhub-service/values.schema.yaml b/binderhub-service/values.schema.yaml
index 1599be6..9e3b18b 100644
--- a/binderhub-service/values.schema.yaml
+++ b/binderhub-service/values.schema.yaml
@@ -17,6 +17,7 @@ additionalProperties: false
 required:
   # General configuration
   - global
+  - custom
   # Resources for the BinderHub created build pods
   - buildPodsRegistryCredentials
   # Deployment resource
@@ -46,6 +47,9 @@ properties:
   global:
     type: object
     additionalProperties: true
+  custom:
+    type: object
+    additionalProperties: true
 
   # Resources for the BinderHub created build pods
   # ---------------------------------------------------------------------------
diff --git a/binderhub-service/values.yaml b/binderhub-service/values.yaml
index d3f7b50..767eb3b 100644
--- a/binderhub-service/values.yaml
+++ b/binderhub-service/values.yaml
@@ -4,6 +4,7 @@
 nameOverride: ""
 fullnameOverride: ""
 global: {}
+custom: {}
 
 # Resources for the BinderHub created build pods
 # -----------------------------------------------------------------------------
diff --git a/tools/templates/lint-and-validate-values.yaml b/tools/templates/lint-and-validate-values.yaml
index 02fde33..7143819 100644
--- a/tools/templates/lint-and-validate-values.yaml
+++ b/tools/templates/lint-and-validate-values.yaml
@@ -4,6 +4,7 @@
 nameOverride: ""
 fullnameOverride: ""
 global: {}
+custom: {}
 
 # Resources for the BinderHub created build pods
 # -----------------------------------------------------------------------------