diff --git a/packages/base-contract/CHANGELOG.json b/packages/base-contract/CHANGELOG.json
index ed3c86465d..c5d467b7f8 100644
--- a/packages/base-contract/CHANGELOG.json
+++ b/packages/base-contract/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "version": "0.3.0",
+        "changes": [
+            {
+                "note": "Update ethers-contracts to ethers.js",
+                "pr": 540
+            }
+        ]
+    },
     {
         "timestamp": 1524044013,
         "version": "0.2.1",
diff --git a/packages/contract_templates/partials/callAsync.handlebars b/packages/contract_templates/partials/callAsync.handlebars
index 3cc16ccc67..58fb2f09c7 100644
--- a/packages/contract_templates/partials/callAsync.handlebars
+++ b/packages/contract_templates/partials/callAsync.handlebars
@@ -18,12 +18,10 @@ async callAsync(
         }
     )
     const rawCallResult = await self._web3Wrapper.callAsync(callDataWithDefaults, defaultBlock);
-    let result = ethersFunction.parse(rawCallResult);
-
+    let resultArray = ethersFunction.parse(rawCallResult);
     const outputAbi = (_.find(self.abi, {name: '{{this.name}}'}) as MethodAbi).outputs;
-    result = BaseContract._formatABIDataItemList(outputAbi, result, BaseContract._lowercaseAddress.bind(this));
-    result = BaseContract._formatABIDataItemList(outputAbi, result, BaseContract._bnToBigNumber.bind(this));
-
-    return result{{#singleReturnValue}}[0]{{/singleReturnValue}};
+    resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._lowercaseAddress.bind(this));
+    resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._bnToBigNumber.bind(this));
+    return resultArray{{#singleReturnValue}}[0]{{/singleReturnValue}};
 },
 {{/hasReturnValue}}
diff --git a/packages/typescript-typings/CHANGELOG.json b/packages/typescript-typings/CHANGELOG.json
index a2f1e76151..3ef30ad8ef 100644
--- a/packages/typescript-typings/CHANGELOG.json
+++ b/packages/typescript-typings/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "version": "0.3.0",
+        "changes": [
+            {
+                "note": "Add types for `ethers.js`",
+                "pr": 540
+            }
+        ]
+    },
     {
         "version": "0.2.0",
         "changes": [
diff --git a/packages/typescript-typings/types/ethers/index.d.ts b/packages/typescript-typings/types/ethers/index.d.ts
index a3d27a98c6..7e04c7dd13 100644
--- a/packages/typescript-typings/types/ethers/index.d.ts
+++ b/packages/typescript-typings/types/ethers/index.d.ts
@@ -23,17 +23,9 @@ declare module 'ethers' {
     export class Interface {
         public functions: { [functionName: string]: FunctionDescription };
         public events: { [eventName: string]: EventDescription };
-        // public static decodeParams(types: string[], data: string): any[];
         constructor(abi: any);
     }
     export class Contract {
         constructor(address: string, abi: any, provider: any);
     }
 }
-
-declare module 'ethers/utils/abi-coder' {
-    export class Coder {
-        public decode(names: any[], types: any[], data?: any[]): any[];
-        defaultCoder: Coder;
-    }
-}
diff --git a/packages/utils/CHANGELOG.json b/packages/utils/CHANGELOG.json
index 1aeb3b4572..e7f3c052c6 100644
--- a/packages/utils/CHANGELOG.json
+++ b/packages/utils/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "version": "0.6.0",
+        "changes": [
+            {
+                "note": "Update ethers-contracts to ethers.js",
+                "pr": 540
+            }
+        ]
+    },
     {
         "version": "0.5.2",
         "changes": [
diff --git a/packages/web3-wrapper/package.json b/packages/web3-wrapper/package.json
index f11efb1a5d..1183307074 100644
--- a/packages/web3-wrapper/package.json
+++ b/packages/web3-wrapper/package.json
@@ -61,7 +61,6 @@
         "@0xproject/types": "^0.6.1",
         "@0xproject/typescript-typings": "^0.2.0",
         "@0xproject/utils": "^0.5.2",
-        "ethers-contracts": "^2.2.1",
         "ethers": "^3.0.15",
         "lodash": "^4.17.4",
         "web3": "^0.20.0"