diff --git a/backend/requirements.txt b/backend/requirements.txt
index bc80374..2ab0f69 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -33,8 +33,8 @@ websockets
 aiohttp
 
 # Google Agentic Stack (ADK augments LangChain — does not replace langchain-core)
-google-adk>=1.0
-a2a-sdk[fastapi]>=1.0
+google-adk>=2.4.0
+a2a-sdk[fastapi]>=1.1.0
 a2ui-agent-sdk
 
 # Multi-agent orchestration (Code Lab CrewAI pipeline + SSE streaming)