diff --git a/lib/config.js b/lib/config.js
index 692b958d..cd849fae 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -25,6 +25,7 @@ const DEFAULT_CONFIG = {
       'python',
       'python3',
       'ruby',
+      'rust',
       'scala',
       'swift'
     ],
diff --git a/lib/helper.js b/lib/helper.js
index 5ca496aa..c2085134 100644
--- a/lib/helper.js
+++ b/lib/helper.js
@@ -42,6 +42,7 @@ const LANGS = [
   {lang: 'python',     ext: '.py',         style: '#'},
   {lang: 'python3',    ext: '.py',         style: '#'},
   {lang: 'ruby',       ext: '.rb',         style: '#'},
+  {lang: 'rust',       ext: '.rs',         style: 'c'},
   {lang: 'scala',      ext: '.scala',      style: 'c'},
   {lang: 'swift',      ext: '.swift',      style: 'c'}
 ];
diff --git a/test/mock/find-the-difference.json.20171216 b/test/mock/find-the-difference.json.20171216
index bd1f7dc6..e6518ee4 100644
--- a/test/mock/find-the-difference.json.20171216
+++ b/test/mock/find-the-difference.json.20171216
@@ -1 +1 @@
-{"data":{"question":{"content":"<p>\r\nGiven two strings <b><i>s</i></b> and <b><i>t</i></b> which consist of only lowercase letters.</p>\r\n\r\n<p>String <b><i>t</i></b> is generated by random shuffling string <b><i>s</i></b> and then add one more letter at a random position.</p>\r\n\r\n<p>Find the letter that was added in <b><i>t</i></b>.</p>\r\n\r\n<p><b>Example:</b>\r\n<pre>\r\nInput:\r\ns = \"abcd\"\r\nt = \"abcde\"\r\n\r\nOutput:\r\ne\r\n\r\nExplanation:\r\n'e' is the letter that was added.\r\n</pre>","stats":"{\"totalAccepted\": \"89.7K\", \"totalSubmission\": \"175.7K\"}","codeDefinition":"[{\"text\": \"C++\", \"value\": \"cpp\", \"defaultCode\": \"class Solution {\\r\\npublic:\\r\\n    char findTheDifference(string s, string t) {\\r\\n        \\r\\n    }\\r\\n};\"}, {\"text\": \"Java\", \"value\": \"java\", \"defaultCode\": \"class Solution {\\r\\n    public char findTheDifference(String s, String t) {\\r\\n        \\r\\n    }\\r\\n}\"}, {\"text\": \"Python\", \"value\": \"python\", \"defaultCode\": \"class Solution(object):\\r\\n    def findTheDifference(self, s, t):\\r\\n        \\\"\\\"\\\"\\r\\n        :type s: str\\r\\n        :type t: str\\r\\n        :rtype: str\\r\\n        \\\"\\\"\\\"\\r\\n        \"}, {\"text\": \"Python3\", \"value\": \"python3\", \"defaultCode\": \"class Solution:\\r\\n    def findTheDifference(self, s, t):\\r\\n        \\\"\\\"\\\"\\r\\n        :type s: str\\r\\n        :type t: str\\r\\n        :rtype: str\\r\\n        \\\"\\\"\\\"\\r\\n        \"}, {\"text\": \"C\", \"value\": \"c\", \"defaultCode\": \"char findTheDifference(char* s, char* t) {\\r\\n    \\r\\n}\"}, {\"text\": \"C#\", \"value\": \"csharp\", \"defaultCode\": \"public class Solution {\\r\\n    public char FindTheDifference(string s, string t) {\\r\\n        \\r\\n    }\\r\\n}\"}, {\"text\": \"JavaScript\", \"value\": \"javascript\", \"defaultCode\": \"/**\\r\\n * @param {string} s\\r\\n * @param {string} t\\r\\n * @return {character}\\r\\n */\\r\\nvar findTheDifference = function(s, t) {\\r\\n    \\r\\n};\"}, {\"text\": \"Ruby\", \"value\": \"ruby\", \"defaultCode\": \"# @param {String} s\\r\\n# @param {String} t\\r\\n# @return {Character}\\r\\ndef find_the_difference(s, t)\\r\\n    \\r\\nend\"}, {\"text\": \"Swift\", \"value\": \"swift\", \"defaultCode\": \"class Solution {\\r\\n    func findTheDifference(_ s: String, _ t: String) -> Character {\\r\\n        \\r\\n    }\\r\\n}\"}, {\"text\": \"Go\", \"value\": \"golang\", \"defaultCode\": \"func findTheDifference(s string, t string) byte {\\r\\n    \\r\\n}\"}, {\"text\": \"Scala\", \"value\": \"scala\", \"defaultCode\": \"object Solution {\\n    def findTheDifference(s: String, t: String): Char = {\\n        \\n    }\\n}\"}, {\"text\": \"Kotlin\", \"value\": \"kotlin\", \"defaultCode\": \"class Solution {\\n    fun findTheDifference(s: String, t: String): Char {\\n        \\n    }\\n}\"}]","sampleTestCase":"\"abcd\"\n\"abcde\"","enableRunCode":true,"metaData":"{\r\n  \"name\": \"findTheDifference\",\r\n  \"params\": [\r\n    {\r\n      \"name\": \"s\",\r\n      \"type\": \"string\"\r\n    },\r\n    {\r\n      \"name\": \"t\",\r\n      \"type\": \"string\"\r\n    }\r\n  ],\r\n  \"return\": {\r\n    \"type\": \"character\"\r\n  }\r\n}","discussCategoryId":"511"}}}
\ No newline at end of file
+{"data":{"question":{"content":"<p>\r\nGiven two strings <b><i>s</i></b> and <b><i>t</i></b> which consist of only lowercase letters.</p>\r\n\r\n<p>String <b><i>t</i></b> is generated by random shuffling string <b><i>s</i></b> and then add one more letter at a random position.</p>\r\n\r\n<p>Find the letter that was added in <b><i>t</i></b>.</p>\r\n\r\n<p><b>Example:</b>\r\n<pre>\r\nInput:\r\ns = \"abcd\"\r\nt = \"abcde\"\r\n\r\nOutput:\r\ne\r\n\r\nExplanation:\r\n'e' is the letter that was added.\r\n</pre>","stats":"{\"totalAccepted\": \"89.7K\", \"totalSubmission\": \"175.7K\"}","codeDefinition":"[{\"text\": \"C++\", \"value\": \"cpp\", \"defaultCode\": \"class Solution {\\r\\npublic:\\r\\n    char findTheDifference(string s, string t) {\\r\\n        \\r\\n    }\\r\\n};\"}, {\"text\": \"Java\", \"value\": \"java\", \"defaultCode\": \"class Solution {\\r\\n    public char findTheDifference(String s, String t) {\\r\\n        \\r\\n    }\\r\\n}\"}, {\"text\": \"Python\", \"value\": \"python\", \"defaultCode\": \"class Solution(object):\\r\\n    def findTheDifference(self, s, t):\\r\\n        \\\"\\\"\\\"\\r\\n        :type s: str\\r\\n        :type t: str\\r\\n        :rtype: str\\r\\n        \\\"\\\"\\\"\\r\\n        \"}, {\"text\": \"Python3\", \"value\": \"python3\", \"defaultCode\": \"class Solution:\\r\\n    def findTheDifference(self, s, t):\\r\\n        \\\"\\\"\\\"\\r\\n        :type s: str\\r\\n        :type t: str\\r\\n        :rtype: str\\r\\n        \\\"\\\"\\\"\\r\\n        \"}, {\"text\": \"C\", \"value\": \"c\", \"defaultCode\": \"char findTheDifference(char* s, char* t) {\\r\\n    \\r\\n}\"}, {\"text\": \"C#\", \"value\": \"csharp\", \"defaultCode\": \"public class Solution {\\r\\n    public char FindTheDifference(string s, string t) {\\r\\n        \\r\\n    }\\r\\n}\"}, {\"text\": \"JavaScript\", \"value\": \"javascript\", \"defaultCode\": \"/**\\r\\n * @param {string} s\\r\\n * @param {string} t\\r\\n * @return {character}\\r\\n */\\r\\nvar findTheDifference = function(s, t) {\\r\\n    \\r\\n};\"}, {\"text\": \"Ruby\", \"value\": \"ruby\", \"defaultCode\": \"# @param {String} s\\r\\n# @param {String} t\\r\\n# @return {Character}\\r\\ndef find_the_difference(s, t)\\r\\n    \\r\\nend\"}, {\"text\": \"Swift\", \"value\": \"swift\", \"defaultCode\": \"class Solution {\\r\\n    func findTheDifference(_ s: String, _ t: String) -> Character {\\r\\n        \\r\\n    }\\r\\n}\"}, {\"text\": \"Go\", \"value\": \"golang\", \"defaultCode\": \"func findTheDifference(s string, t string) byte {\\r\\n    \\r\\n}\"}, {\"text\": \"Scala\", \"value\": \"scala\", \"defaultCode\": \"object Solution {\\n    def findTheDifference(s: String, t: String): Char = {\\n        \\n    }\\n}\"}, {\"text\": \"Kotlin\", \"value\": \"kotlin\", \"defaultCode\": \"class Solution {\\n    fun findTheDifference(s: String, t: String): Char {\\n        \\n    }\\n}\"}, {\"text\": \"Rust\", \"value\": \"rust\", \"defaultCode\": \"impl Solution {\\n    pub fn find_the_difference(s: String, t:String) -> char {\\n        \\n    }\\n}\"}]","sampleTestCase":"\"abcd\"\n\"abcde\"","enableRunCode":true,"metaData":"{\r\n  \"name\": \"findTheDifference\",\r\n  \"params\": [\r\n    {\r\n      \"name\": \"s\",\r\n      \"type\": \"string\"\r\n    },\r\n    {\r\n      \"name\": \"t\",\r\n      \"type\": \"string\"\r\n    }\r\n  ],\r\n  \"return\": {\r\n    \"type\": \"character\"\r\n  }\r\n}","discussCategoryId":"511"}}}
\ No newline at end of file
diff --git a/test/plugins/test_leetcode.js b/test/plugins/test_leetcode.js
index ef099b9b..10738885 100644
--- a/test/plugins/test_leetcode.js
+++ b/test/plugins/test_leetcode.js
@@ -211,7 +211,7 @@ describe('plugin:leetcode', function() {
             ''
           ].join('\r\n'));
 
-        assert.equal(problem.templates.length, 12);
+        assert.equal(problem.templates.length, 13);
 
         assert.equal(problem.templates[0].value, 'cpp');
         assert.equal(problem.templates[0].text, 'C++');
@@ -352,6 +352,17 @@ describe('plugin:leetcode', function() {
             '}'
           ].join('\n'));
 
+        assert.equal(problem.templates[12].value, 'rust');
+        assert.equal(problem.templates[12].text, 'Rust');
+        assert.equal(problem.templates[12].defaultCode,
+          [
+            'impl Solution {',
+            '    pub fn find_the_difference(s: String, t:String) -> char {',
+            '        ',
+            '    }',
+            '}'
+          ].join('\n'));
+
         done();
       });
     });
diff --git a/test/test_helper.js b/test/test_helper.js
index cfc502d4..70fec05d 100644
--- a/test/test_helper.js
+++ b/test/test_helper.js
@@ -131,6 +131,7 @@ describe('helper', function() {
       assert.equal(h.langToExt('python'), '.py');
       assert.equal(h.langToExt('python3'), '.py');
       assert.equal(h.langToExt('ruby'), '.rb');
+      assert.equal(h.langToExt('rust'), '.rs');
       assert.equal(h.langToExt('scala'), '.scala');
       assert.equal(h.langToExt('swift'), '.swift');
       assert.equal(h.langToExt('rust'), '.raw');
@@ -148,6 +149,7 @@ describe('helper', function() {
       assert.equal(h.extToLang('c:/file.js'), 'javascript');
       assert.equal(h.extToLang('c:/Users/skygragon/file.py'), 'python');
       assert.equal(h.extToLang('~/file.rb'), 'ruby');
+      assert.equal(h.extToLang('/home/skygragon/file.rust'), 'rust');
       assert.equal(h.extToLang('/tmp/file.scala'), 'scala');
       assert.equal(h.extToLang('~/leetcode/file.swift'), 'swift');
       assert.equal(h.extToLang('~/leetcode/../file.sql'), 'mysql');
@@ -172,6 +174,7 @@ describe('helper', function() {
       assert.deepEqual(h.langToCommentStyle('python'), RUBY_STYLE);
       assert.deepEqual(h.langToCommentStyle('python3'), RUBY_STYLE);
       assert.deepEqual(h.langToCommentStyle('ruby'), RUBY_STYLE);
+      assert.deepEqual(h.langToCommentStyle('rust'), C_STYLE);
       assert.deepEqual(h.langToCommentStyle('scala'), C_STYLE);
       assert.deepEqual(h.langToCommentStyle('swift'), C_STYLE);
     });