diff --git a/data/data.json b/data/data.json
index 89b5cf2..6a93d7f 100644
--- a/data/data.json
+++ b/data/data.json
@@ -15,7 +15,7 @@
                 "url=[a-zA-Z0-9\\-\\.\\_\\%]*[\\?|&]?",
                 "spIA=[a-zA-Z0-9\\-\\.\\_\\%]*[\\?|&]?",
                 "rh=[a-zA-Z0-9\\-\\.\\_\\%]*[\\?|&]?",
-                "ref=[a-zA-Z0-9\\-\\.\\_\\%]*[\\?|&]?"
+                "ref[\\_]?=[a-zA-Z0-9\\-\\.\\_\\%]*[\\?|&]?"
             ],
             "exceptions": [
                 ".*(amazon\\.)\\w{2,}(\/gp\/).*\\/redirector.html\\/.*"