diff --git a/requirements.txt b/requirements.txt
index 9ab0412..4543376 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 httpx>=0.28.1          # HTTP client for KeeperHub + Uniswap + AXL transport
 pydantic>=2.13.4        # Schemas (JobRequest, Receipt, X402PaymentProof, OpenClawAuditEnvelope)
 eth-account>=0.13.7    # EIP-191 signing for x402 + audit envelope
-fastapi>=0.110.0       # Node B HTTP server (Path B: direct HTTP between nodes)
+fastapi>=0.136.3       # Node B HTTP server (Path B: direct HTTP between nodes)
 uvicorn>=0.47.0        # ASGI runner for fastapi
 python-dotenv>=1.2.2   # .env loading