diff --git a/metagpt/environment/__init__.py b/metagpt/environment/__init__.py
index 692672fa7..28981f2f8 100644
--- a/metagpt/environment/__init__.py
+++ b/metagpt/environment/__init__.py
@@ -4,10 +4,9 @@
 
 from metagpt.environment.base_env import Environment
 from metagpt.environment.android_env.android_env import AndroidEnv
-from metagpt.environment.mincraft_env.mincraft_env import MincraftExtEnv
 from metagpt.environment.werewolf_env.werewolf_env import WerewolfEnv
 from metagpt.environment.stanford_town_env.stanford_town_env import StanfordTownEnv
 from metagpt.environment.software_env.software_env import SoftwareEnv
 
 
-__all__ = ["AndroidEnv", "MincraftExtEnv", "WerewolfEnv", "StanfordTownEnv", "SoftwareEnv", "Environment"]
+__all__ = ["AndroidEnv", "WerewolfEnv", "StanfordTownEnv", "SoftwareEnv", "Environment"]
diff --git a/metagpt/roles/__init__.py b/metagpt/roles/__init__.py
index f033a5dfa..08a0406b3 100644
--- a/metagpt/roles/__init__.py
+++ b/metagpt/roles/__init__.py
@@ -14,7 +14,6 @@ from metagpt.roles.engineer import Engineer
 from metagpt.roles.qa_engineer import QaEngineer
 from metagpt.roles.searcher import Searcher
 from metagpt.roles.sales import Sales
-from metagpt.roles.customer_service import CustomerService
 
 
 __all__ = [
@@ -26,5 +25,4 @@ __all__ = [
     "QaEngineer",
     "Searcher",
     "Sales",
-    "CustomerService",
 ]
diff --git a/requirements.txt b/requirements.txt
index 6b23e47b6..2e6cce034 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,14 +10,6 @@ typer==0.9.0
 # godot==0.1.1
 # google_api_python_client==2.93.0  # Used by search_engine.py
 lancedb==0.4.0
-llama-index-core==0.10.15
-llama-index-embeddings-azure-openai==0.1.6
-llama-index-embeddings-openai==0.1.5
-llama-index-llms-azure-openai==0.1.4
-llama-index-readers-file==0.1.4
-llama-index-retrievers-bm25==0.1.3
-llama-index-vector-stores-faiss==0.1.1
-chromadb==0.4.23
 loguru==0.6.0
 meilisearch==0.21.0
 numpy==1.24.3
diff --git a/setup.py b/setup.py
index df9bedc9b..f834b4c44 100644
--- a/setup.py
+++ b/setup.py
@@ -28,6 +28,16 @@ extras_require = {
     "search-google": ["google-api-python-client==2.94.0"],
     "search-ddg": ["duckduckgo-search~=4.1.1"],
     "ocr": ["paddlepaddle==2.4.2", "paddleocr>=2.0.1", "tabulate==0.9.0"],
+    "rag": [
+        "llama-index-core==0.10.15",
+        "llama-index-embeddings-azure-openai==0.1.6",
+        "llama-index-embeddings-openai==0.1.5",
+        "llama-index-llms-azure-openai==0.1.4",
+        "llama-index-readers-file==0.1.4",
+        "llama-index-retrievers-bm25==0.1.3",
+        "llama-index-vector-stores-faiss==0.1.1",
+        "chromadb==0.4.23",
+    ],
 }
 
 extras_require["test"] = [
@@ -42,7 +52,6 @@ extras_require["test"] = [
     "connexion[uvicorn]~=3.0.5",
     "azure-cognitiveservices-speech~=1.31.0",
     "aioboto3~=11.3.0",
-    "chromadb==0.4.23",
     "gradio==3.0.0",
     "grpcio-status==1.48.2",
     "pylint==3.0.3",