diff --git a/package.json b/package.json
index 2f26a24..1da0e22 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ezerous/drizzle",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "A reactive data-store for web3 and smart contracts.",
   "license": "MIT",
   "author": "Ezerous <ezerous@gmail.com>",
diff --git a/src/defaultOptions.js b/src/defaultOptions.js
index e157670..4e76a5e 100644
--- a/src/defaultOptions.js
+++ b/src/defaultOptions.js
@@ -1,5 +1,6 @@
 const defaultOptions = {
   web3: {
+    customProvider:{},
     fallback: {
       type: 'ws',
       url: 'ws://127.0.0.1:8545'
diff --git a/src/web3/web3Reducer.js b/src/web3/web3Reducer.js
index 9344cfa..b9a9cfa 100644
--- a/src/web3/web3Reducer.js
+++ b/src/web3/web3Reducer.js
@@ -2,7 +2,8 @@ import * as Action from './web3Actions'
 import { ACCOUNTS_FAILED } from '../accounts/accountsActions'
 
 const initialState = {
-  status: 'initializing'
+  status: 'initializing',
+  isMetaMask: false
 }
 
 const web3Reducer = (state = initialState, action) => {
@@ -14,9 +15,11 @@ const web3Reducer = (state = initialState, action) => {
   }
 
   if (action.type === Action.WEB3_INITIALIZED) {
+    const { web3 } = action;
     return {
       ...state,
-      status: 'initialized'
+      status: 'initialized',
+      isMetaMask: !!(web3 && web3.currentProvider && web3.currentProvider.isMetaMask)
     }
   }
 
diff --git a/src/web3/web3Saga.js b/src/web3/web3Saga.js
index 8f54fb9..77f317f 100644
--- a/src/web3/web3Saga.js
+++ b/src/web3/web3Saga.js
@@ -33,31 +33,28 @@ export function * initializeWeb3 (options) {
 
         yield put({ type: Action.WEB3_FAILED, error });
       }
-    } else if (typeof window.web3 !== 'undefined') {
-      // Checking if Web3 has been injected by the browser (Mist/MetaMask)
-      // Use Mist/MetaMask's provider.
-      web3 = new Web3(window.web3.currentProvider)
-      yield put({ type: Action.WEB3_INITIALIZED, web3 })
-
-      return web3
+    } else if (options.customProvider) {
+        web3 = options.customProvider
+        yield put({ type: Action.WEB3_INITIALIZED, web3 })
+        return web3
     } else if (options.fallback) {
-      // Attempt fallback if no web3 injection.
-      switch (options.fallback.type) {
-        case 'ws':
-          const provider = new Web3.providers.WebsocketProvider(
-            options.fallback.url
-          )
-          web3 = new Web3(provider)
-          yield put({ type: Action.WEB3_INITIALIZED, web3 })
-          return web3
-
-        default:
-          // Invalid options; throw.
-          throw new Error('Invalid web3 fallback provided.')
-      }
+        // Attempt fallback if no web3 injection.
+        switch (options.fallback.type) {
+          case 'ws':
+            const provider = new Web3.providers.WebsocketProvider(
+              options.fallback.url
+            )
+            web3 = new Web3(provider)
+            yield put({ type: Action.WEB3_INITIALIZED, web3 })
+            return web3
+
+          default:
+            // Invalid options; throw.
+            throw new Error('Invalid web3 fallback provided.')
+        }
     } else {
-      // Out of web3 options; throw.
-      throw new Error('Cannot find injected web3 or valid fallback.')
+        // Out of web3 options; throw.
+        throw new Error('Cannot find injected web3 or valid fallback.')
     }
   } catch (error) {
     yield put({ type: Action.WEB3_FAILED, error })
diff --git a/yarn.lock b/yarn.lock
index 2520532..01efb6c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -645,7 +645,7 @@ decompress-response@^3.2.0, decompress-response@^3.3.0:
   dependencies:
     mimic-response "^1.0.0"
 
-deepmerge@4.2.2:
+deepmerge@~4.2.2:
   version "4.2.2"
   resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-4.2.2.tgz#44d2ea3679b8f4d4ffba33f03d865fc1e7bf4955"
   integrity sha512-FJ3UgI4gIl+PHZm53knsuSFpE+nESMr7M4v9QcgB7S63Kj/6WqMiFQJpBBYz1Pt+66bZpP3Q7Lye0Oo9MPKEdg==
@@ -1226,7 +1226,7 @@ is-plain-obj@^1.1.0:
   resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-1.1.0.tgz#71a50c8429dfca773c92a390a4a03b39fcd51d3e"
   integrity sha1-caUMhCnfync8kqOQpKA7OfzVHT4=
 
-is-plain-object@5.0.0:
+is-plain-object@~5.0.0:
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-5.0.0.tgz#4427f50ab3429e9025ea7d52e9043a9ef4159344"
   integrity sha512-VRSzKkbMm5jMDoKLbltAkFQ5Qr7VDiTFGXxYFXXowVj387GeGNOCsOH6Msy00SGZ3Fp84b1Naa1psqgcCIEP5Q==
@@ -1767,14 +1767,14 @@ readable-stream@^3.6.0:
     string_decoder "^1.1.1"
     util-deprecate "^1.0.1"
 
-redux-saga@1.1.3:
+redux-saga@~1.1.3:
   version "1.1.3"
   resolved "https://registry.yarnpkg.com/redux-saga/-/redux-saga-1.1.3.tgz#9f3e6aebd3c994bbc0f6901a625f9a42b51d1112"
   integrity sha512-RkSn/z0mwaSa5/xH/hQLo8gNf4tlvT18qXDNvedihLcfzh+jMchDgaariQoehCpgRltEm4zHKJyINEz6aqswTw==
   dependencies:
     "@redux-saga/core" "^1.1.3"
 
-redux@4.0.5, redux@^4.0.4:
+redux@^4.0.4, redux@~4.0.5:
   version "4.0.5"
   resolved "https://registry.yarnpkg.com/redux/-/redux-4.0.5.tgz#4db5de5816e17891de8a80c424232d06f051d93f"
   integrity sha512-VSz1uMAH24DM6MF72vcojpYPtrTUu3ByVWfPL1nPfVRb5mZVTve5GnNCUV53QM/BZ66xfWrm0CTWoM+Xlz8V1w==
@@ -2417,7 +2417,7 @@ web3-utils@1.3.0:
     underscore "1.9.1"
     utf8 "3.0.0"
 
-web3@1.3.0:
+web3@~1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/web3/-/web3-1.3.0.tgz#8fe4cd6e2a21c91904f343ba75717ee4c76bb349"
   integrity sha512-4q9dna0RecnrlgD/bD1C5S+81Untbd6Z/TBD7rb+D5Bvvc0Wxjr4OP70x+LlnwuRDjDtzBwJbNUblh2grlVArw==