1 files changed, 3 insertions, 4 deletions
diff --git a/sphinx/util/jsdump.py b/sphinx/util/jsdump.py
index e75f9f848..ede4ae7da 100644
--- a/sphinx/util/jsdump.py
+++ b/sphinx/util/jsdump.py
@@ -12,8 +12,7 @@
 
 import re
 
-import six
-from six import iteritems, integer_types
+from six import iteritems, integer_types, string_types
 
 from sphinx.util.pycompat import u
 
@@ -77,7 +76,7 @@ double   in   super""".split())
 
 def dumps(obj, key=False):
     if key:
-        if not isinstance(obj, six.string_types):
+        if not isinstance(obj, string_types):
             obj = str(obj)
         if _nameonly_re.match(obj) and obj not in reswords:
             return obj  # return it as a bare word
@@ -96,7 +95,7 @@ def dumps(obj, key=False):
         ) for key, value in iteritems(obj))
     elif isinstance(obj, (tuple, list, set)):
         return '[%s]' % ','.join(dumps(x) for x in obj)
-    elif isinstance(obj, six.string_types):
+    elif isinstance(obj, string_types):
         return encode_string(obj)
     raise TypeError(type(obj))