diff --git a/lib/atom-cfn-lint.js b/lib/atom-cfn-lint.js
index 884bdf9..4e5223a 100644
--- a/lib/atom-cfn-lint.js
+++ b/lib/atom-cfn-lint.js
@@ -200,7 +200,7 @@ module.exports = {
 
             // Rule sources are added in version 0.3.3 of cfn-lint
             if (Object.prototype.hasOwnProperty.call(match.Rule, 'Source')) {
-              sourceUrl = match.Rule.Source.toLowerCase()
+              sourceUrl = match.Rule.Source
             }
 
             toReturn.push({