diff --git a/x10/perpetual/configuration.py b/x10/perpetual/configuration.py
index f080d74..a73f24d 100644
--- a/x10/perpetual/configuration.py
+++ b/x10/perpetual/configuration.py
@@ -27,7 +27,7 @@ class EndpointConfig:
 TESTNET_CONFIG = EndpointConfig(
     chain_rpc_url="https://rpc.sepolia.org",
     api_base_url="https://api.starknet.sepolia.extended.exchange/api/v1",
-    stream_url="wss://starknet.sepolia.extended.exchange/stream.extended.exchange/v1",
+    stream_url="wss://api.starknet.sepolia.extended.exchange/stream.extended.exchange/v1",
     onboarding_url="https://api.starknet.sepolia.extended.exchange",
     signing_domain="starknet.sepolia.extended.exchange",
     collateral_asset_contract="0x31857064564ed0ff978e687456963cba09c2c6985d8f9300a1de4962fafa054",