diff --git a/base/kcconf.py b/base/kcconf.py
index 5f313a8..82f3970 100644
--- a/base/kcconf.py
+++ b/base/kcconf.py
@@ -6,14 +6,14 @@ import os
 import os.path
 
 def configkopano(configs):
-    for filename, config in configs.iteritems():
+    for filename, config in configs.items():
         if not os.path.exists(filename):
             return
         with open(filename) as f:
             contents = f.read()
         f.close()
 
-        for key, newvalue in config.iteritems():
+        for key, newvalue in config.items():
             contents = re.sub(r"^\s*#?\s*{}\s*=.*".format(key), r"{} = {}".format(key, newvalue), contents, 0, re.MULTILINE)
 
         with open(filename, "w") as f:
@@ -22,7 +22,7 @@ def configkopano(configs):
 
 def parseenvironmentvariables(prependingpath):
     configs = dict()
-    for name, value in os.environ.iteritems():
+    for name, value in os.environ.items():
         namematch = re.match(r"^KCCONF_([A-Z]+)_([A-Z0-9_]+)$", name)
         if namematch != None:
             filename = namematch.group(1).lower() + ".cfg"