diff --git a/__tests__/URL-test.js b/__tests__/URL-test.js
new file mode 100644
index 00000000..820f91f5
--- /dev/null
+++ b/__tests__/URL-test.js
@@ -0,0 +1,39 @@
+import {URL_REGEX_WITH_REQUIRED_PROTOCOL, URL_REGEX} from '../lib/Url';
+
+describe('Mandatory protocol for URL', () => {
+    it('correctly tests valid urls', () => {
+        const regexToTest = new RegExp(`^${URL_REGEX_WITH_REQUIRED_PROTOCOL}$`, 'i');
+        expect(regexToTest.test('https://google.com/')).toBeTruthy();
+        expect(regexToTest.test('http://google.com/')).toBeTruthy();
+        expect(regexToTest.test('ftp://google.com/')).toBeTruthy();
+        expect(regexToTest.test('https://we.are.expensify.com/how-we-got-here')).toBeTruthy();
+        expect(regexToTest.test('https://google.com:12')).toBeTruthy();
+        expect(regexToTest.test('https://google.com:65535')).toBeTruthy();
+        expect(regexToTest.test('https://google.com:65535/path/my')).toBeTruthy();
+    });
+    it('correctly tests invalid urls', () => {
+        const regexToTest = new RegExp(`^${URL_REGEX_WITH_REQUIRED_PROTOCOL}$`, 'i');
+        expect(regexToTest.test('google.com')).toBeFalsy();
+        expect(regexToTest.test('https://google.com:02')).toBeFalsy();
+        expect(regexToTest.test('https://google.com:65536')).toBeFalsy();
+        expect(regexToTest.test('smtp://google.com')).toBeFalsy();
+    });
+});
+
+describe('Optional protocol for URL', () => {
+    it('correctly tests valid urls', () => {
+        const regexToTest = new RegExp(`^${URL_REGEX}$`, 'i');
+        expect(regexToTest.test('google.com/')).toBeTruthy();
+        expect(regexToTest.test('https://google.com/')).toBeTruthy();
+        expect(regexToTest.test('ftp://google.com/')).toBeTruthy();
+        expect(regexToTest.test('we.are.expensify.com/how-we-got-here')).toBeTruthy();
+        expect(regexToTest.test('google.com:12')).toBeTruthy();
+        expect(regexToTest.test('google.com:65535')).toBeTruthy();
+        expect(regexToTest.test('google.com:65535/path/my')).toBeTruthy();
+    });
+    it('correctly tests invalid urls', () => {
+        const regexToTest = new RegExp(`^${URL_REGEX}$`, 'i');
+        expect(regexToTest.test('google.com:02')).toBeFalsy();
+        expect(regexToTest.test('google.com:65536')).toBeFalsy();
+    });
+});
diff --git a/lib/Url.js b/lib/Url.js
index c2d5f97e..71e0034f 100644
--- a/lib/Url.js
+++ b/lib/Url.js
@@ -1,16 +1,22 @@
 import TLD_REGEX from './tlds';
 
-const URL_WEBSITE_REGEX = `(https?:\\/\\/)?((?:www\\.)?[a-z0-9](?:[-a-z0-9]*[a-z0-9])?\\.)+(?:${TLD_REGEX})(?:\\:\\d{2,4}|\\b|(?=_))`;
+const ALLOWED_PORTS = '([1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])';
+const URL_PROTOCOL_REGEX = '((ht|f)tps?:\\/\\/)';
+const URL_WEBSITE_REGEX = `${URL_PROTOCOL_REGEX}?((?:www\\.)?[a-z0-9](?:[-a-z0-9]*[a-z0-9])?\\.)+(?:${TLD_REGEX})(?:\\:${ALLOWED_PORTS}|\\b|(?=_))`;
 const addEscapedChar = reg => `(?:${reg}|&(?:amp|quot|#x27);)`;
 const URL_PATH_REGEX = `(?:${addEscapedChar('[.,=(+$!*]')}?\\/${addEscapedChar('[-\\w$@.+!*:(),=%~]')}*${addEscapedChar('[-\\w~@:%)]')}|\\/)*`;
 const URL_PARAM_REGEX = `(?:\\?${addEscapedChar('[-\\w$@.+!*()\\/,=%{}:;\\[\\]\\|_]')}*)?`;
 const URL_FRAGMENT_REGEX = `(?:#${addEscapedChar('[-\\w$@.+!*()[\\],=%;\\/:~]')}*)?`;
 const URL_REGEX = `(${URL_WEBSITE_REGEX}${URL_PATH_REGEX}(?:${URL_PARAM_REGEX}|${URL_FRAGMENT_REGEX})*)`;
 
+const URL_REGEX_WITH_REQUIRED_PROTOCOL = URL_REGEX.replace(`${URL_PROTOCOL_REGEX}?`, URL_PROTOCOL_REGEX);
+
 export {
     URL_WEBSITE_REGEX,
     URL_PATH_REGEX,
     URL_PARAM_REGEX,
     URL_FRAGMENT_REGEX,
-    URL_REGEX
+    URL_REGEX,
+    URL_REGEX_WITH_REQUIRED_PROTOCOL,
+    URL_PROTOCOL_REGEX,
 };