diff --git a/Dockerfile b/Dockerfile
index 2774a09..87b5958 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,3 @@
-FROM ghcr.io/hasura/ndc-rest:v0.2.0
-
-ENV HASURA_CONFIGURATION_DIRECTORY /etc/connector
+FROM ghcr.io/hasura/ndc-rest:v0.2.1
 
 COPY ./config /etc/connector
diff --git a/Makefile b/Makefile
index 82fa29b..207a1ec 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,11 @@
-NDC_REST_VERSION ?= v0.2.0
+NDC_REST_VERSION ?= v0.2.1
 ORY_HYDRA_VERSION ?= v1.11.10
 UID ?= $(shell id -u)
 GID ?= $(shell id -g)
 
 .PHONY: build-schema
 build-schema:
-	go install github.com/hasura/ndc-rest-schema@$(NDC_REST_VERSION)
+	go install github.com/hasura/ndc-rest-schema@latest
 	ndc-rest-schema convert \
 		-c schema/public/config.yaml \
 		-o config/schema-public.json
diff --git a/README.md b/README.md
index 2c3014a..645f861 100644
--- a/README.md
+++ b/README.md
@@ -7,13 +7,15 @@ This connector is built upon the [NDC Rest](https://github.com/hasura/ndc-rest)
 > [!NOTE]
 > THe connector `v0.x` supports Hydra v1 API spec. Use `v1.x` or above if you want to use Hydra v2.
 
+> [!NOTE]
+> Support `client_secret_post` auth method for public APIs that require `client_credentials` credentials such as `/oauth2/*` only. The connector mainly supports admin API wrappers for Hasura Engine v3.
+
 ## Environment Variables
 
 | Name                           | Description                                                   | Default Value         |
 | ------------------------------ | ------------------------------------------------------------- | --------------------- |
 | HYDRA_PUBLIC_SERVER_URL        | Public Hydra server URL                                       | http://localhost:4444 |
 | HYDRA_ADMIN_SERVER_URL         | Admin Hydra server URL                                        | http://localhost:4445 |
-| HYDRA_PUBLIC_BASIC_TOKEN       | Basic token for public Hydra server                           |                       |
 | HYDRA_PUBLIC_TIMEOUT           | Default request timeout for public APIs in seconds            | 30                    |
 | HYDRA_PUBLIC_RETRY_TIMES       | Number of retry times for public APIs                         | 0                     |
 | HYDRA_PUBLIC_RETRY_DELAY       | Delay time between each retry in milliseconds for public APIs | 1000                  |
diff --git a/config/schema-public.json b/config/schema-public.json
index 831c7ce..96a9380 100644
--- a/config/schema-public.json
+++ b/config/schema-public.json
@@ -1448,13 +1448,6 @@
         "type": "int64"
       }
     },
-    "JSON": {
-      "aggregate_functions": {},
-      "comparison_operators": {},
-      "representation": {
-        "type": "json"
-      }
-    },
     "JSONRawMessage": {
       "aggregate_functions": {},
       "comparison_operators": {},
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 25b5d8e..b44e685 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -4,8 +4,8 @@ services:
       context: .
     ports:
       - 8080:8080
-    # volumes:
-    #   - ./config:/etc/connector:ro
+    volumes:
+      - ./config:/etc/connector:ro
     environment:
       HYDRA_PUBLIC_SERVER_URL: http://hydra:4444
       HYDRA_ADMIN_SERVER_URL: http://hydra:4445