diff --git a/api2pdf/api2pdf.py b/api2pdf/api2pdf.py
index 1167ef8..ccd74f5 100644
--- a/api2pdf/api2pdf.py
+++ b/api2pdf/api2pdf.py
@@ -155,7 +155,7 @@ def result(self):
 
     def download_pdf(self):
         USERAGENT = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'}
-        if self.result['success']:
+        if self.result['Success']:
             downloaded_file = requests.get(self.result['FileUrl'], headers=USERAGENT)
             data = downloaded_file.content
             return data