diff --git a/requirements.txt b/requirements.txt
index 21a2e22..b9227d0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 # a2a-pack is auto-installed by the deploy build.
-jsonschema>=4.22
-httpx>=0.27
-pytest>=8.0
-pytest-asyncio>=0.23
+# These starter deps power the DeepAgents tool-calling example in agent.py.
+deepagents>=0.5.0
+langchain>=0.3
+langchain-openai>=0.2
+langgraph>=0.6