diff --git a/trappy/base.py b/trappy/base.py
index 385c8aac..55f0dca4 100644
--- a/trappy/base.py
+++ b/trappy/base.py
@@ -298,7 +298,7 @@ def write_csv(self, fname):
         :param fname: The name of the CSV file
         :type fname: str
         """
-        self.data_frame.to_csv(fname)
+        self.data_frame.to_csv(fname, encoding='utf-8')
 
     def read_csv(self, fname):
         """Read the csv data into a DataFrame