diff --git a/src/diraccfg/cfg.py b/src/diraccfg/cfg.py
index a58246f..ff46089 100644
--- a/src/diraccfg/cfg.py
+++ b/src/diraccfg/cfg.py
@@ -7,10 +7,16 @@
 import os
 import re
 import zipfile
-import six
 import threading
 
 
+# Avoid using six as this file should be usable without any dependencies
+try:
+  string_types = (basestring,)
+except NameError:
+  string_types = (str,)
+
+
 def S_ERROR(messageString=''):
   return {'OK': False, 'Message': str(messageString)}
 
@@ -21,8 +27,8 @@ def S_OK(value=''):
 
 class ListDummy(object):
   def fromChar(self, inputString, sepChar=","):
-    if not (isinstance(inputString, six.string_types)
-            and isinstance(sepChar, six.string_types)
+    if not (isinstance(inputString, string_types)
+            and isinstance(sepChar, string_types)
             and sepChar):  # to prevent getting an empty String as argument
       return None
 
@@ -100,7 +106,7 @@ def createNewSection(self, sectionName, comment="", contents=False):
       if not recDict:
         return S_ERROR("Parent section does not exist %s" % sectionName)
       parentSection = recDict['value']
-      if isinstance(parentSection, six.string_types):
+      if isinstance(parentSection, string_types):
         raise KeyError("Entry %s doesn't seem to be a section" % recDict['key'])
       return parentSection.createNewSection(recDict['levelsBelow'], comment, contents)
     self.__addEntry(sectionName, comment)
@@ -145,7 +151,7 @@ def setOption(self, optionName, value, comment=""):
       if not recDict:
         return S_ERROR("Parent section does not exist %s" % optionName)
       parentSection = recDict['value']
-      if isinstance(parentSection, six.string_types):
+      if isinstance(parentSection, string_types):
         raise KeyError("Entry %s doesn't seem to be a section" % recDict['key'])
       return parentSection.setOption(recDict['levelsBelow'], value, comment)
     self.__addEntry(optionName, comment)
@@ -259,9 +265,9 @@ def listOptions(self, ordered=True):
     :return: List with the option names
     """
     if ordered:
-      return [sKey for sKey in self.__orderedList if isinstance(self.__dataDict[sKey], six.string_types)]
+      return [sKey for sKey in self.__orderedList if isinstance(self.__dataDict[sKey], string_types)]
     else:
-      return [sKey for sKey in self.__dataDict.keys() if isinstance(self.__dataDict[sKey], six.string_types)]
+      return [sKey for sKey in self.__dataDict.keys() if isinstance(self.__dataDict[sKey], string_types)]
 
   @gCFGSynchro
   def listSections(self, ordered=True):
@@ -273,9 +279,9 @@ def listSections(self, ordered=True):
     :return: List with the subsection names
     """
     if ordered:
-      return [sKey for sKey in self.__orderedList if not isinstance(self.__dataDict[sKey], six.string_types)]
+      return [sKey for sKey in self.__orderedList if not isinstance(self.__dataDict[sKey], string_types)]
     else:
-      return [sKey for sKey in self.__dataDict.keys() if not isinstance(self.__dataDict[sKey], six.string_types)]
+      return [sKey for sKey in self.__dataDict.keys() if not isinstance(self.__dataDict[sKey], string_types)]
 
   @gCFGSynchro
   def isSection(self, key):
@@ -291,11 +297,11 @@ def isSection(self, key):
       if not keyDict:
         return False
       section = keyDict['value']
-      if isinstance(section, six.string_types):
+      if isinstance(section, string_types):
         return False
       secKey = keyDict['levelsBelow']
       return section.isSection(secKey)
-    return key in self.__dataDict and not isinstance(self.__dataDict[key], six.string_types)
+    return key in self.__dataDict and not isinstance(self.__dataDict[key], string_types)
 
   @gCFGSynchro
   def isOption(self, key):
@@ -311,11 +317,11 @@ def isOption(self, key):
       if not keyDict:
         return False
       section = keyDict['value']
-      if isinstance(section, six.string_types):
+      if isinstance(section, string_types):
         return False
       secKey = keyDict['levelsBelow']
       return section.isOption(secKey)
-    return key in self.__dataDict and isinstance(self.__dataDict[key], six.string_types)
+    return key in self.__dataDict and isinstance(self.__dataDict[key], string_types)
 
   def listAll(self):
     """
@@ -399,7 +405,7 @@ def getOption(self, opName, defaultValue=None):
         return defaultValue
       dataD = dataV
 
-    if not isinstance(dataV, six.string_types):
+    if not isinstance(dataV, string_types):
       optionValue = defaultValue
     else:
       optionValue = dataV
@@ -465,7 +471,7 @@ def getAsDict(self, path=""):
       if not reqDict:
         return resVal
       keyCfg = reqDict['value']
-      if isinstance(keyCfg, six.string_types):
+      if isinstance(keyCfg, string_types):
         return resVal
       return keyCfg.getAsDict()
     for op in self.listOptions():