diff --git a/docs/source/conf.py b/docs/source/conf.py
index 884ce114..0a45b338 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -14,6 +14,7 @@
 # serve to show the default.
 
 import os, re, shlex, sys
+sys.setdefaultencoding('utf8')
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the