diff --git a/src/coinbase/staking_operation.ts b/src/coinbase/staking_operation.ts
index fe94875a..4e289e65 100644
--- a/src/coinbase/staking_operation.ts
+++ b/src/coinbase/staking_operation.ts
@@ -3,7 +3,7 @@ import {
   StakingOperation as StakingOperationModel,
   StakingOperationStatusEnum,
 } from "../client/api";
-import { Transaction } from "./transaction";
+import { ITransaction, Transaction } from "./transaction";
 import { Coinbase } from "./coinbase";
 import { delay } from "./utils";
 
@@ -16,7 +16,7 @@ export interface IStakingOperation {
   isTerminalState(): boolean;
   isFailedState(): boolean;
   isCompleteState(): boolean;
-  getTransactions(): Transaction[];
+  getTransactions(): ITransaction[];
   getSignedVoluntaryExitMessages(): string[];
   reload(): Promise<void>;
   wait(options?: {
diff --git a/src/coinbase/wallet.ts b/src/coinbase/wallet.ts
index 88b952ef..af220e82 100644
--- a/src/coinbase/wallet.ts
+++ b/src/coinbase/wallet.ts
@@ -16,9 +16,9 @@ import { ArgumentError } from "./errors";
 import { FaucetTransaction, IFaucetTransaction } from "./faucet_transaction";
 import { IPayloadSignature } from "./payload_signature";
 import { ISmartContract } from "./smart_contract";
-import { StakingBalance } from "./staking_balance";
+import { IStakingBalance, StakingBalance } from "./staking_balance";
 import { IStakingOperation } from "./staking_operation";
-import { StakingReward } from "./staking_reward";
+import { IStakingReward, StakingReward } from "./staking_reward";
 import { ITrade } from "./trade";
 import { ITransfer } from "./transfer";
 import {
@@ -69,12 +69,12 @@ export interface IWallet {
     startTime?: string,
     endTime?: string,
     format?: StakingRewardFormat,
-  ): Promise<StakingReward[]>;
+  ): Promise<IStakingReward[]>;
   historicalStakingBalances(
     assetId: string,
     startTime?: string,
     endTime?: string,
-  ): Promise<StakingBalance[]>;
+  ): Promise<IStakingBalance[]>;
   listHistoricalBalances(
     options: ListHistoricalBalancesOptions,
   ): Promise<ListHistoricalBalancesResult>;