diff --git a/.env.example b/.env.example
index 088d3f63f..fb5dc7dac 100644
--- a/.env.example
+++ b/.env.example
@@ -9,7 +9,7 @@ API_KEY=sk-your-openai-api-key-here
 
 # Example BASE_URL values:
 # - OpenAI:    https://api.openai.com/v1
-# - Gemini:    https://generativelanguage.googleapis.com/v1beta/openai/
+# - Gemini:    https://generativelanguage.googleapis.com
 # - LM Studio: http://localhost:1234/v1
 # - Ollama:    http://localhost:11434/v1
 
diff --git a/requirements.txt b/requirements.txt
index 088e6574a..d9d7a0822 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,20 +1,29 @@
 pyyaml
 openai
-google-genai
 tenacity
 mcp
 fastmcp
 faiss-cpu
-fastapi
+fastapi==0.124.0
+click>=8.1.8,<8.3
 uvicorn
 websockets
 wsproto
-pydantic
+pydantic==2.12.5
 requests
 pytest
-pysqlite3
 ddgs
 beautifulsoup4
 matplotlib
 networkx
 cartopy
+pandas>=2.3.3
+openpyxl>=3.1.2
+numpy>=2.3.5
+seaborn>=0.13.2
+google-genai>=1.52.0
+chardet>=5.2.0
+pygame>=2.6.1
+filelock>=3.20.1
+markdown>=3.10
+xhtml2pdf>=0.2.17
diff --git a/yaml_instance/demo_human.yaml b/yaml_instance/demo_human.yaml
index 19a25e489..2248d9efc 100755
--- a/yaml_instance/demo_human.yaml
+++ b/yaml_instance/demo_human.yaml
@@ -10,6 +10,7 @@ graph:
   - id: A
     type: agent
     config:
+      provider: openai
       base_url: ${BASE_URL}
       api_key: ${API_KEY}
       name: gpt-4o
@@ -36,6 +37,7 @@ graph:
   - id: C
     type: agent
     config:
+      provider: openai
       base_url: ${BASE_URL}
       api_key: ${API_KEY}
       name: gpt-4o