diff --git a/src/ngSanitize/filter/linky.js b/src/ngSanitize/filter/linky.js
index e0be704f9c2c..04c7d0402b55 100644
--- a/src/ngSanitize/filter/linky.js
+++ b/src/ngSanitize/filter/linky.js
@@ -104,8 +104,8 @@
  */
 angular.module('ngSanitize').filter('linky', ['$sanitize', function($sanitize) {
   var LINKY_URL_REGEXP =
-        /((ftp|https?):\/\/|(www\.)|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"”’]/,
-      MAILTO_REGEXP = /^mailto:/;
+        /((ftp|https?):\/\/|(www\.)|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"”’]/i,
+      MAILTO_REGEXP = /^mailto:/i;
 
   return function(text, target) {
     if (!text) return text;
diff --git a/test/ngSanitize/filter/linkySpec.js b/test/ngSanitize/filter/linkySpec.js
index baac45bd6d82..f0c4f3956e54 100644
--- a/test/ngSanitize/filter/linkySpec.js
+++ b/test/ngSanitize/filter/linkySpec.js
@@ -20,6 +20,15 @@ describe('linky', function() {
     expect(linky(undefined)).not.toBeDefined();
   });
 
+  it('should be case-insensitive', function() {
+    expect(linky('WWW.example.com')).toEqual('<a href="http://WWW.example.com">WWW.example.com</a>');
+    expect(linky('WWW.EXAMPLE.COM')).toEqual('<a href="http://WWW.EXAMPLE.COM">WWW.EXAMPLE.COM</a>');
+    expect(linky('HTTP://www.example.com')).toEqual('<a href="HTTP://www.example.com">HTTP://www.example.com</a>');
+    expect(linky('HTTP://example.com')).toEqual('<a href="HTTP://example.com">HTTP://example.com</a>');
+    expect(linky('HTTPS://www.example.com')).toEqual('<a href="HTTPS://www.example.com">HTTPS://www.example.com</a>');
+    expect(linky('HTTPS://example.com')).toEqual('<a href="HTTPS://example.com">HTTPS://example.com</a>');
+  });
+
   it('should handle www.', function() {
     expect(linky('www.example.com')).toEqual('<a href="http://www.example.com">www.example.com</a>');
   });