diff --git a/opengraph/opengraph.py b/opengraph/opengraph.py
index 9cedb97..24a687e 100644
--- a/opengraph/opengraph.py
+++ b/opengraph/opengraph.py
@@ -55,7 +55,7 @@ def parser(self, html):
         """
         """
         if not isinstance(html,BeautifulSoup):
-            doc = BeautifulSoup(html)
+            doc = BeautifulSoup(html, 'html.parser')
         else:
             doc = html
         ogs = doc.html.head.findAll(property=re.compile(r'^og'))
@@ -123,4 +123,4 @@ def scrape_url(self, doc):
     def scrape_description(self, doc):
         tag = doc.html.head.findAll('meta', attrs={"name":"description"})
         result = "".join([t['content'] for t in tag])
-        return result
\ No newline at end of file
+        return result