diff --git a/packages/web3-wrapper/CHANGELOG.md b/packages/web3-wrapper/CHANGELOG.md
index eb31f7e3c3..e51366e6f3 100644
--- a/packages/web3-wrapper/CHANGELOG.md
+++ b/packages/web3-wrapper/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
-## v0.1.12 _February 9, 2018_
+## v0.2.XX - _TBD_ 2018
+
+    *  Ensure all returned user addresses are lowercase (#373)
+
+## v0.1.12 -  _February 9, 2018_
 
     * Fix publishing issue where .npmignore was not properly excluding undesired content (#389)
diff --git a/packages/web3-wrapper/src/index.ts b/packages/web3-wrapper/src/index.ts
index a2878fc2a3..7f3452c985 100644
--- a/packages/web3-wrapper/src/index.ts
+++ b/packages/web3-wrapper/src/index.ts
@@ -41,7 +41,8 @@ export class Web3Wrapper {
     }
     public async isSenderAddressAvailableAsync(senderAddress: string): Promise<boolean> {
         const addresses = await this.getAvailableAddressesAsync();
-        return _.includes(addresses, senderAddress);
+        const normalizedAddress = senderAddress.toLowerCase();
+        return _.includes(addresses, normalizedAddress);
     }
     public async getNodeVersionAsync(): Promise<string> {
         const nodeVersion = await promisify<string>(this._web3.version.getNode)();
@@ -96,7 +97,8 @@ export class Web3Wrapper {
     }
     public async getAvailableAddressesAsync(): Promise<string[]> {
         const addresses = await promisify<string[]>(this._web3.eth.getAccounts)();
-        return addresses;
+        const normalizedAddresses = _.map(addresses, address => address.toLowerCase());
+        return normalizedAddresses;
     }
     public async getLogsAsync(filter: Web3.FilterObject): Promise<Web3.LogEntry[]> {
         let fromBlock = filter.fromBlock;