3 files changed, 7 insertions, 9 deletions

diff --git a/packages/base-contract/src/index.ts b/packages/base-contract/src/index.ts
index 7e0428d92..a8e4ad2e2 100644
--- a/packages/base-contract/src/index.ts
+++ b/packages/base-contract/src/index.ts
@@ -12,13 +12,12 @@ 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]: Interface;
+    [key: string]: ethers.utils.Interface;
 }
 
 const REVERT_ERROR_SELECTOR = '08c379a0';
@@ -118,7 +117,7 @@ export class BaseContract {
             }
         }
     }
-    protected _lookupEthersInterface(functionSignature: string): Interface {
+    protected _lookupEthersInterface(functionSignature: string): ethers.utils.Interface {
         const ethersInterface = this._ethersInterfacesByFunctionSignature[functionSignature];
         if (_.isUndefined(ethersInterface)) {
             throw new Error(`Failed to lookup method with function signature '${functionSignature}'`);
@@ -155,7 +154,7 @@ export class BaseContract {
         this._ethersInterfacesByFunctionSignature = {};
         _.each(methodAbis, methodAbi => {
             const functionSignature = abiUtils.getFunctionSignature(methodAbi);
-            this._ethersInterfacesByFunctionSignature[functionSignature] = new Interface([methodAbi]);
+            this._ethersInterfacesByFunctionSignature[functionSignature] = new ethers.utils.Interface([methodAbi]);
         });
     }
 }
diff --git a/packages/contract_templates/contract.handlebars b/packages/contract_templates/contract.handlebars
index de48779d3..41e5c8630 100644
--- a/packages/contract_templates/contract.handlebars
+++ b/packages/contract_templates/contract.handlebars
@@ -5,7 +5,7 @@ import { BaseContract } from '@0xproject/base-contract';
 import { BlockParam, BlockParamLiteral, CallData, ContractAbi, ContractArtifact, DecodedLogArgs, MethodAbi, Provider, TxData, TxDataPayable } from 'ethereum-types';
 import { BigNumber, classUtils, logUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
-import { Interface } from 'ethers/utils/interface';
+import * as ethers from 'ethers';
 import * as _ from 'lodash';
 // tslint:enable:no-unused-variable
 
@@ -65,7 +65,7 @@ export class {{contractName}}Contract extends BaseContract {
             [{{> params inputs=ctor.inputs}}],
             BaseContract._bigNumberToString,
         );
-        const iface = new Interface(abi);
+        const iface = new ethers.utils.Interface(abi);
         const deployInfo = iface.deployFunction;
         const txData = deployInfo.encode(bytecode, [{{> params inputs=ctor.inputs}}]);
         const web3Wrapper = new Web3Wrapper(provider);
diff --git a/packages/utils/src/abi_decoder.ts b/packages/utils/src/abi_decoder.ts
index 836037f30..ac3e54efb 100644
--- a/packages/utils/src/abi_decoder.ts
+++ b/packages/utils/src/abi_decoder.ts
@@ -10,7 +10,6 @@ import {
     SolidityTypes,
 } from 'ethereum-types';
 import { ethers } from 'ethers';
-import { Interface } from 'ethers/utils/interface';
 import * as _ from 'lodash';
 
 import { addressUtils } from './address_utils';
@@ -42,7 +41,7 @@ export class AbiDecoder {
             return log;
         }
         const event = this._methodIds[methodId][numIndexedArgs];
-        const ethersInterface = new Interface([event]);
+        const ethersInterface = new ethers.utils.Interface([event]);
         const decodedParams: DecodedLogArgs = {};
         let topicsIndex = 1;
 
@@ -97,7 +96,7 @@ export class AbiDecoder {
         if (_.isUndefined(abiArray)) {
             return;
         }
-        const ethersInterface = new Interface(abiArray);
+        const ethersInterface = new ethers.utils.Interface(abiArray);
         _.map(abiArray, (abi: AbiDefinition) => {
             if (abi.type === AbiType.Event) {
                 const topic = ethersInterface.events[abi.name].topic;