diff --git a/lib/random/mersennetwister.js b/lib/random/mersennetwister.js
index 56dd7df..ddf8e20 100644
--- a/lib/random/mersennetwister.js
+++ b/lib/random/mersennetwister.js
@@ -84,3 +84,5 @@ function MersenneTwister () { // eslint-disable-line no-unused-vars
     return ((this.int32() >>> 5) * 67108864.0 + (this.int32() >>> 6)) / 9007199254740992.0
   }
 }
+
+module.exports = { MersenneTwister }
\ No newline at end of file
diff --git a/lib/random/random.js b/lib/random/random.js
index 3811eef..247a3c4 100644
--- a/lib/random/random.js
+++ b/lib/random/random.js
@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+const MersenneTwister = require('./mersennetwister')
+
 var random = { // eslint-disable-line no-unused-vars
   seed: null,
   twister: null,
@@ -14,7 +16,7 @@ var random = { // eslint-disable-line no-unused-vars
     if (seed === null || seed === undefined) {
       this.seed = new Date().getTime()
     }
-    this.twister = new MersenneTwister()
+    this.twister = new MersenneTwister.MersenneTwister()
     this.twister.seed(this.seed)
   },
   number: function (limit) {
@@ -166,3 +168,8 @@ var random = { // eslint-disable-line no-unused-vars
     return this.number(Math.pow(2, len * 4)).toString(16)
   }
 }
+
+module.exports = {
+  random,
+  MersenneTwister
+}