diff --git a/v4-client-js/package.json b/v4-client-js/package.json
index fd47e3fb..409ae0ad 100644
--- a/v4-client-js/package.json
+++ b/v4-client-js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@dydxprotocol/v4-client-js",
-  "version": "0.36.0",
+  "version": "0.36.1",
   "description": "General client library for the new dYdX system (v4 decentralized)",
   "main": "build/src/index.js",
   "scripts": {
diff --git a/v4-client-js/src/clients/constants.ts b/v4-client-js/src/clients/constants.ts
index 29cd3a85..a0cc748f 100644
--- a/v4-client-js/src/clients/constants.ts
+++ b/v4-client-js/src/clients/constants.ts
@@ -8,20 +8,20 @@ export * from '../lib/constants';
 // Chain ID
 export const DEV_CHAIN_ID = 'dydxprotocol-testnet';
 export const STAGING_CHAIN_ID = 'dydxprotocol-testnet';
-export const TESTNET_CHAIN_ID = 'dydx-testnet-2';
+export const TESTNET_CHAIN_ID = 'dydx-testnet-3';
 
 // ------------ API URLs ------------
 export enum IndexerApiHost {
   DEV = 'https://indexer.v4dev.dydx.exchange',
   STAGING = 'https://indexer.v4staging.dydx.exchange',
-  TESTNET = 'https://indexer.v4testnet.dydx.exchange',
+  TESTNET = 'https://dydx-testnet.imperator.co',
   // TODO: Add MAINNET
 }
 
 export enum IndexerWSHost {
   DEV = 'wss://indexer.v4dev.dydx.exchange/v4/ws',
   STAGING = 'wss://indexer.v4staging.dydx.exchange/v4/ws',
-  TESTNET = 'wss://indexer.v4testnet.dydx.exchange/v4/ws',
+  TESTNET = 'wss://dydx-testnet.imperator.co/v4/ws',
   // TODO: Add MAINNET
 }
 
@@ -34,7 +34,7 @@ export enum FaucetApiHost {
 export enum ValidatorApiHost {
   DEV = 'https://validator.v4dev.dydx.exchange',
   STAGING = 'https://validator.v4staging.dydx.exchange',
-  TESTNET = 'https://validator.v4testnet.dydx.exchange',
+  TESTNET = 'https://dydx-testnet-archive.allthatnode.com',
   // TODO: Add MAINNET
 }
 
diff --git a/v4-client-py/pyproject.toml b/v4-client-py/pyproject.toml
index cd59ede8..9c0507ef 100644
--- a/v4-client-py/pyproject.toml
+++ b/v4-client-py/pyproject.toml
@@ -5,7 +5,7 @@ package-dir = {"" = "v4_client_py"}
 
 [tool.poetry]
 name = "v4-client-py"
-version = "0.6.0"
+version = "0.6.1"
 description = "dYdX v4 Client"
 authors = ["John Huang <contact@dydx.exchange>"]
 license = "BSL-1.1"
diff --git a/v4-client-py/v4_client_py/clients/constants.py b/v4-client-py/v4_client_py/clients/constants.py
index d092c974..4a1ba0ba 100644
--- a/v4-client-py/v4_client_py/clients/constants.py
+++ b/v4-client-py/v4_client_py/clients/constants.py
@@ -4,7 +4,7 @@
 
 # ------------ API URLs ------------
 INDEXER_API_HOST_MAINNET = None
-INDEXER_API_HOST_TESTNET = 'https://indexer.v4testnet.dydx.exchange'
+INDEXER_API_HOST_TESTNET = 'https://dydx-testnet.imperator.co'
 INDEXER_API_HOST_STAGING = 'https://indexer.v4staging.dydx.exchange'
 INDEXER_API_HOST_DEV = 'https://indexer.v4dev.dydx.exchange'
 INDEXER_WS_HOST_MAINNET = None
@@ -17,12 +17,12 @@
 FAUCET_API_HOST_DEV = 'https://faucet.v4dev.expotrading.com'
 
 VALIDATOR_API_HOST_MAINNET = None
-VALIDATOR_API_HOST_TESTNET = 'https://validator.v4testnet.dydx.exchange'
+VALIDATOR_API_HOST_TESTNET = 'https://dydx-testnet-archive.allthatnode.com'
 VALIDATOR_API_HOST_STAGING = 'https://validator.v4staging.dydx.exchange'
 VALIDATOR_API_HOST_DEV = 'https://validator.v4dev.dydx.exchange'
 
 VALIDATOR_GRPC_MAINNET = None
-VALIDATOR_GRPC_TESTNET = 'validator.v4testnet2.dydx.exchange:9090'
+VALIDATOR_GRPC_TESTNET = 'dydx-testnet-archive.allthatnode.com:9090'
 VALIDATOR_GRPC_STAGING = '54.249.255.18:9090'
 VALIDATOR_GRPC_DEV = '52.192.187.113:9090'