diff --git a/lib/hash/index.js b/lib/hash/index.js
index 523c98e..3baed26 100644
--- a/lib/hash/index.js
+++ b/lib/hash/index.js
@@ -9,8 +9,9 @@
 
     }
 }(this, function(exports) {
-    exports.sha1 = require('./sha1');
     exports.crc32 = require('./crc32');
+    exports.md5 = require('./md5');
+    exports.sha1 = require('./sha1');
 
     return exports;
 }));
diff --git a/lib/hash/md5.js b/lib/hash/md5.js
new file mode 100644
index 0000000..4b80762
--- /dev/null
+++ b/lib/hash/md5.js
@@ -0,0 +1 @@
+module.exports = require('MD5');
diff --git a/package.json b/package.json
index bcc2545..1e44208 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "i18next-text",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "Using i18next translations without having the `key` as strings, you do not need to worry about i18n key naming.",
   "homepage": "http://cheton.github.io/i18next-text/",
   "author": "Cheton Wu <cheton@gmail.com>",
@@ -29,9 +29,11 @@
     "i18n",
     "hash",
     "sha1",
-    "crc32"
+    "crc32",
+    "md5"
   ],
   "dependencies": {
+    "MD5": "^1.2.1",
     "crc-32": "^0.2.2",
     "i18next": "^1.7.10",
     "sha1": "^1.1.0"
diff --git a/test/fixtures/i18n/de/resource.json b/test/fixtures/i18n/de/resource.json
index 54461c3..1399d4d 100644
--- a/test/fixtures/i18n/de/resource.json
+++ b/test/fixtures/i18n/de/resource.json
@@ -1,5 +1,6 @@
 {
     "loading": "Wird geladen...",
-    "b04ba49f848624bb97ab094a2631d2ad74913498": "Wird geladen...",
-    "cd643ef3": "Wird geladen..."
+    "cd643ef3": "Wird geladen...",
+    "8524de963f07201e5c086830d370797f": "Wird geladen...",
+    "b04ba49f848624bb97ab094a2631d2ad74913498": "Wird geladen..."
 }
diff --git a/test/fixtures/i18n/en/resource.json b/test/fixtures/i18n/en/resource.json
index 2dd19ff..4faec94 100644
--- a/test/fixtures/i18n/en/resource.json
+++ b/test/fixtures/i18n/en/resource.json
@@ -1,5 +1,6 @@
 {
     "loading": "Loading...",
-    "b04ba49f848624bb97ab094a2631d2ad74913498": "Loading...",
-    "cd643ef3": "Loading..."
+    "cd643ef3": "Loading...",
+    "8524de963f07201e5c086830d370797f": "Loading...",
+    "b04ba49f848624bb97ab094a2631d2ad74913498": "Loading..."
 }
diff --git a/test/fixtures/i18n/es/resource.json b/test/fixtures/i18n/es/resource.json
index 22e6a1f..c8af1a3 100644
--- a/test/fixtures/i18n/es/resource.json
+++ b/test/fixtures/i18n/es/resource.json
@@ -1,5 +1,6 @@
 {
     "loading": "Cargando...",
-    "b04ba49f848624bb97ab094a2631d2ad74913498": "Cargando...",
-    "cd643ef3": "Cargando..."
+    "cd643ef3": "Cargando...",
+    "8524de963f07201e5c086830d370797f": "Cargando...",
+    "b04ba49f848624bb97ab094a2631d2ad74913498": "Cargando..."
 }
diff --git a/test/fixtures/i18n/fr/resource.json b/test/fixtures/i18n/fr/resource.json
index b12f5cd..d21f36b 100644
--- a/test/fixtures/i18n/fr/resource.json
+++ b/test/fixtures/i18n/fr/resource.json
@@ -1,5 +1,6 @@
 {
     "loading": "Chargement...",
-    "b04ba49f848624bb97ab094a2631d2ad74913498": "Chargement...",
-    "cd643ef3": "Chargement..."
+    "cd643ef3": "Chargement...",
+    "8524de963f07201e5c086830d370797f": "Chargement...",
+    "b04ba49f848624bb97ab094a2631d2ad74913498": "Chargement..."
 }
diff --git a/test/fixtures/i18n/it/resource.json b/test/fixtures/i18n/it/resource.json
index 86229c9..76786d6 100644
--- a/test/fixtures/i18n/it/resource.json
+++ b/test/fixtures/i18n/it/resource.json
@@ -1,5 +1,6 @@
 {
     "loading": "Caricamento in corso...",
-    "b04ba49f848624bb97ab094a2631d2ad74913498": "Caricamento in corso...",
-    "cd643ef3": "Caricamento in corso..."
+    "cd643ef3": "Caricamento in corso...",
+    "8524de963f07201e5c086830d370797f": "Caricamento in corso...",
+    "b04ba49f848624bb97ab094a2631d2ad74913498": "Caricamento in corso..."
 }
diff --git a/test/fixtures/i18n/ja/resource.json b/test/fixtures/i18n/ja/resource.json
index 9ac3720..50a9840 100644
--- a/test/fixtures/i18n/ja/resource.json
+++ b/test/fixtures/i18n/ja/resource.json
@@ -1,5 +1,6 @@
 {
     "loading": "ロード中...",
-    "b04ba49f848624bb97ab094a2631d2ad74913498": "ロード中...",
-    "cd643ef3": "ロード中..."
+    "cd643ef3": "ロード中...",
+    "8524de963f07201e5c086830d370797f": "ロード中...",
+    "b04ba49f848624bb97ab094a2631d2ad74913498": "ロード中..."
 }
diff --git a/test/main.js b/test/main.js
index 5def933..9a9a3c6 100755
--- a/test/main.js
+++ b/test/main.js
@@ -58,112 +58,69 @@ test('i18next initialization', function(t) {
     });
 });
 
-test('sha1', function(t) {
+test('hash function', function(t) {
     i18n.init(i18nextOptions, function() {
-        var str = 'Loading...';
-        var expectedKey = 'b04ba49f848624bb97ab094a2631d2ad74913498';
-
-        var sha1 = require('../lib/hash/sha1');
-        t.equal(expectedKey, sha1(str), 'The value of sha1(' + JSON.stringify(str) + ') should be equal to ' + expectedKey);
-
-        text.init({hash: 'sha1'});
-
-        // Test for existence of a key
-        t.ok(i18n.exists(expectedKey), 'This key should exist.');
-
-        // English
-        i18n.setLng('en');
-        t.equal('Loading...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // German
-        i18n.setLng('de');
-        t.equal('Wird geladen...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // French
-        i18n.setLng('fr');
-        t.equal('Chargement...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // Spanish
-        i18n.setLng('es');
-        t.equal('Cargando...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // Italian
-        i18n.setLng('it');
-        t.equal('Caricamento in corso...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // Japanese
-        i18n.setLng('ja');
-        t.equal('ロード中...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // Not exists
-        str = 'This value does not exist.';
-        expectedKey = sha1(str);
-        t.notOk(i18n.exists(expectedKey));
-        t.notOk(text.exists(str));
-        t.assert(expectedKey === text.key(str));
-        t.equal(str, i18n._(str));
-
-        t.end();
-    });
-});
-
-test('crc32', function(t) {
-    i18n.init(i18nextOptions, function() {
-        var str = 'Loading...';
-        var expectedKey = 'cd643ef3';
-
-        var crc32 = require('../lib/hash/crc32');
-        t.equal(expectedKey, crc32(str), 'The value of crc32(' + JSON.stringify(str) + ') should be equal to ' + expectedKey);
-
-        text.init({hash: 'crc32'});
-
-        // Test for existence of a key
-        t.ok(i18n.exists(expectedKey), 'This key should exist.');
-
-        // English
-        i18n.setLng('en');
-        t.equal('Loading...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // German
-        i18n.setLng('de');
-        t.equal('Wird geladen...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // French
-        i18n.setLng('fr');
-        t.equal('Chargement...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // Spanish
-        i18n.setLng('es');
-        t.equal('Cargando...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // Italian
-        i18n.setLng('it');
-        t.equal('Caricamento in corso...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // Japanese
-        i18n.setLng('ja');
-        t.equal('ロード中...', i18n._(str));
-        t.equal(expectedKey, text.key(str));
-
-        // Not exists
-        str = 'This value does not exist.';
-        expectedKey = crc32(str);
-        t.notOk(i18n.exists(expectedKey));
-        t.notOk(text.exists(str));
-        t.assert(expectedKey === text.key(str));
-        t.equal(str, i18n._(str));
-
-        t.end();
+        var runTests = function(t, hashMethod) {
+            var hash = require('../lib/hash');
+            var str = 'Loading...';
+            var expectedKey = hash[hashMethod](str);
+
+            text.init({hash: hashMethod});
+
+            // Test for existence of a key
+            t.ok(i18n.exists(expectedKey), 'This key should exist.');
+
+            // English
+            i18n.setLng('en');
+            t.equal('Loading...', i18n._(str), 'English translation should be \'Loading...\'');
+            t.equal(expectedKey, text.key(str));
+
+            // German
+            i18n.setLng('de');
+            t.equal('Wird geladen...', i18n._(str), 'German translation should be \'Wird geladen...\'');
+            t.equal(expectedKey, text.key(str));
+
+            // French
+            i18n.setLng('fr');
+            t.equal('Chargement...', i18n._(str), 'French translation should be \'Chargement...\'');
+            t.equal(expectedKey, text.key(str));
+
+            // Spanish
+            i18n.setLng('es');
+            t.equal('Cargando...', i18n._(str), 'Spanish translation should be \'Cargando...\'');
+            t.equal(expectedKey, text.key(str));
+
+            // Italian
+            i18n.setLng('it');
+            t.equal('Caricamento in corso...', i18n._(str), 'Italian translation should be \'Caricamento in corso...\'');
+            t.equal(expectedKey, text.key(str));
+
+            // Japanese
+            i18n.setLng('ja');
+            t.equal('ロード中...', i18n._(str), 'Japanese translation should be \'ロード中...\'');
+            t.equal(expectedKey, text.key(str));
+
+            // Not exists
+            str = 'This value does not exist.';
+            expectedKey = hash[hashMethod](str);
+            t.notOk(i18n.exists(expectedKey));
+            t.notOk(text.exists(str));
+            t.assert(expectedKey === text.key(str));
+            t.equal(str, i18n._(str));
+
+            t.end();
+        };
+
+        t.test('crc32', function(t) {
+            runTests(t, 'crc32');
+        });
+
+        t.test('sha1', function(t) {
+            runTests(t, 'sha1');
+        });
+
+        t.test('md5', function(t) {
+            runTests(t, 'md5');
+        });
     });
 });