diff --git a/charts/mgob/templates/statefulset.yaml b/charts/mgob/templates/statefulset.yaml
index 1383240..0e229da 100644
--- a/charts/mgob/templates/statefulset.yaml
+++ b/charts/mgob/templates/statefulset.yaml
@@ -13,7 +13,7 @@ metadata:
   {{- end }}
 spec:
   serviceName: {{ include "common.names.fullname" .  }}
-  replicas: 1
+  replicas: {{ .Values.replicaCount }}
   selector:
     matchLabels: {{- include "common.labels.matchLabels" . | nindent 6 }}
   template:
diff --git a/charts/mgob/values.schema.json b/charts/mgob/values.schema.json
new file mode 100644
index 0000000..545568d
--- /dev/null
+++ b/charts/mgob/values.schema.json
@@ -0,0 +1,12 @@
+{
+    "$schema": "https://json-schema.org/draft-07/schema#",
+    "title": "Values schema",
+    "type": "object",
+    "properties": {
+        "replicaCount": {
+            "type": "integer",
+            "enum": [0, 1]
+        }
+    },
+    "required": ["replicaCount"]
+}
\ No newline at end of file