diff --git a/sdk/src/gateway/client.ts b/sdk/src/gateway/client.ts
index c05664f5..1090ab20 100644
--- a/sdk/src/gateway/client.ts
+++ b/sdk/src/gateway/client.ts
@@ -41,7 +41,7 @@ export const MAINNET_GATEWAY_BASE_URL = 'https://gateway-api-mainnet.gobob.xyz';
  * Base url for the testnet Gateway API.
  * @default "https://gateway-api-testnet.gobob.xyz"
  */
-export const TESTNET_GATEWAY_BASE_URL = 'https://gateway-api-testnet.gobob.xyz';
+export const TESTNET_GATEWAY_BASE_URL = 'https://gateway-api-signet.gobob.xyz';
 
 /**
  * Base url for the Signet Gateway API.
diff --git a/sdk/src/mempool.ts b/sdk/src/mempool.ts
index fe3832d4..135c26d6 100644
--- a/sdk/src/mempool.ts
+++ b/sdk/src/mempool.ts
@@ -7,7 +7,7 @@ export const MAINNET_MEMPOOL_BASE_PATH = 'https://mempool.space/api/v1';
  * Base path for the testnet Memopool API.
  * @default "https://btc-testnet.gobob.xyz"
  */
-export const TESTNET_MEMPOOL_BASE_PATH = 'https://mempool.space/testnet4/api/v1';
+export const TESTNET_MEMPOOL_BASE_PATH = 'https://mempool.space/signet/api/v1';
 /**
  * Base path for the regtest Memopool API.
  * @default "http://localhost:3003"