diff --git a/.travis.yml b/.travis.yml
index 4f44c2f..421cf09 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,3 +9,4 @@ script:
 branches:
   only:
     - master
+sudo: required
diff --git a/public/scripts/controllers/bib.js b/public/scripts/controllers/bib.js
index 96d78cf..5145eb1 100644
--- a/public/scripts/controllers/bib.js
+++ b/public/scripts/controllers/bib.js
@@ -18,6 +18,7 @@ angular.module('Doi2BibApp')
     var idToSend = $scope.doi;
 
     idToSend = idToSend.replace(/ /g, '');
+    idToSend = idToSend.replace(/^https?:\/\/dx\.doi\.org\//i, '');
 
     if (idToSend.match(/^(doi:)?10\..+\/.+$/i)) {
       if (idToSend.match(/^doi:/i)) {
diff --git a/test/e2e/articles.json b/test/e2e/articles.json
index 9a4923b..75dbbe1 100644
--- a/test/e2e/articles.json
+++ b/test/e2e/articles.json
@@ -9,5 +9,7 @@
   "23193287",
   "PMC3531190",
   "DOI: 10.1016/0304-3959(96)02994-6",
-  "arXiv:1502.0164"
+  "arXiv:1502.0164",
+  "http://dx.doi.org/10.4161/cc.5.3.2426",
+  "https://dx.doi.org/10.4161/cc.5.3.2426"
 ]