diff --git a/scvs.py b/scvs.py
index 0979c6d..4f7d501 100644
--- a/scvs.py
+++ b/scvs.py
@@ -66,7 +66,7 @@ def to_json(self):
 
     def to_xml(self):
         ''' Returns XML '''
-        xml = "<?xml version="1.0" encoding="UTF-8"?>\n"
+        xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
         xml += "<scvs>\n"
 
         for r in self.requirements: