diff --git a/widget.py b/widget.py
index 9029e86..c560408 100644
--- a/widget.py
+++ b/widget.py
@@ -78,7 +78,7 @@ class Widget(QWidget):
         self.enable_create()
 
     def create_button(self):
-        with open(self.in_file) as fin:
+        with open(self.in_file, encoding='utf-8') as fin:
             csvin = csv.DictReader(fin)
             self.create_certificates(csvin)