diff --git a/requirements.txt b/requirements.txt
index e2acab25..e4cbafcf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,6 @@ openai>=3.9.0
 langgraph>=1.2.11          # ✅ LangGraph
 langchain>=1.4.0          # ✅ LangChain Base
 langchain-openai>=1.6.1   # ✅ OpenAI Integration
+pytest==8.0.2          # เพิ่ม
+pytest-cov==4.1.0      # เพิ่ม
+flake8==6.1.0          # เพิ่ม