diff --git a/package.json b/package.json
index 8c501879..99debf64 100644
--- a/package.json
+++ b/package.json
@@ -74,6 +74,7 @@
         "@ledgerhq/hw-transport-node-hid": "^6.27.6",
         "@ledgerhq/hw-transport-webusb": "^6.27.6",
         "@polkadot/extension-dapp": "^0.44.6",
+        "@polkadot/extension-inject": "^0.44.6",
         "@polkadot/keyring": "^7.7.1",
         "@polkadot/util": "^7.7.1",
         "@polkadot/util-crypto": "^7.7.1",
diff --git a/src/accounts/substrate.ts b/src/accounts/substrate.ts
index a0efe487..62f65f83 100644
--- a/src/accounts/substrate.ts
+++ b/src/accounts/substrate.ts
@@ -1,9 +1,9 @@
 import { Account } from "./account";
+import "@polkadot/api-augment";
+
 import { BaseMessage, Chain } from "../messages/message";
 import { GetVerificationBuffer } from "../messages";
-
 import { InjectedExtension } from "@polkadot/extension-inject/types";
-
 import { Keyring } from "@polkadot/keyring";
 import { KeyringPair } from "@polkadot/keyring/types";
 import { cryptoWaitReady, signatureVerify } from "@polkadot/util-crypto";