1 files changed, 5 insertions, 4 deletions
diff --git a/packages/base-contract/src/index.ts b/packages/base-contract/src/index.ts
index 981e6fca6..7e0428d92 100644
--- a/packages/base-contract/src/index.ts
+++ b/packages/base-contract/src/index.ts
@@ -12,12 +12,13 @@ import {
     TxDataPayable,
 } from 'ethereum-types';
 import * as ethers from 'ethers';
+import { Interface } from 'ethers/utils/interface';
 import * as _ from 'lodash';
 
 import { formatABIDataItem } from './utils';
 
 export interface EthersInterfaceByFunctionSignature {
-    [key: string]: ethers.Interface;
+    [key: string]: Interface;
 }
 
 const REVERT_ERROR_SELECTOR = '08c379a0';
@@ -101,7 +102,7 @@ export class BaseContract {
     // if it overflows the corresponding Solidity type, there is a bug in the
     // encoder, or the encoder performs unsafe type coercion.
     public static strictArgumentEncodingCheck(inputAbi: DataItem[], args: any[]): void {
-        const coder = new ethers.AbiCoder();
+        const coder = new ethers.utils.AbiCoder();
         const params = abiUtils.parseEthersParams(inputAbi);
         const rawEncoded = coder.encode(inputAbi, args);
         const rawDecoded = coder.decode(inputAbi, rawEncoded);
@@ -117,7 +118,7 @@ export class BaseContract {
             }
         }
     }
-    protected _lookupEthersInterface(functionSignature: string): ethers.Interface {
+    protected _lookupEthersInterface(functionSignature: string): Interface {
         const ethersInterface = this._ethersInterfacesByFunctionSignature[functionSignature];
         if (_.isUndefined(ethersInterface)) {
             throw new Error(`Failed to lookup method with function signature '${functionSignature}'`);
@@ -154,7 +155,7 @@ export class BaseContract {
         this._ethersInterfacesByFunctionSignature = {};
         _.each(methodAbis, methodAbi => {
             const functionSignature = abiUtils.getFunctionSignature(methodAbi);
-            this._ethersInterfacesByFunctionSignature[functionSignature] = new ethers.Interface([methodAbi]);
+            this._ethersInterfacesByFunctionSignature[functionSignature] = new Interface([methodAbi]);
         });
     }
 }