diff --git a/bots/check-mirroring b/bots/check-mirroring
index 9794df9..2724361 100755
--- a/bots/check-mirroring
+++ b/bots/check-mirroring
@@ -279,7 +279,7 @@ logger.info("Finished receiving Zulip messages!")
 receive_zephyrs()
 logger.info("Finished receiving Zephyr messages!")
 
-all_keys = set(zhkeys.keys() + hzkeys.keys())
+all_keys = set(list(zhkeys.keys()) + list(hzkeys.keys()))
 def process_keys(content_list):
     # Start by filtering out any keys that might have come from
     # concurrent check-mirroring processes
diff --git a/bots/zephyr_mirror_backend.py b/bots/zephyr_mirror_backend.py
index ee57c1b..9fc6953 100755
--- a/bots/zephyr_mirror_backend.py
+++ b/bots/zephyr_mirror_backend.py
@@ -804,9 +804,9 @@ def add_zulip_subscriptions(verbose):
         unauthorized = res.get("unauthorized")
         if verbose:
             if already is not None and len(already) > 0:
-                logger.info("\nAlready subscribed to: %s" % (", ".join(already.values()[0]),))
+                logger.info("\nAlready subscribed to: %s" % (", ".join(list(already.values())[0]),))
             if new is not None and len(new) > 0:
-                logger.info("\nSuccessfully subscribed to: %s" % (", ".join(new.values()[0]),))
+                logger.info("\nSuccessfully subscribed to: %s" % (", ".join(list(new.values())[0]),))
             if unauthorized is not None and len(unauthorized) > 0:
                 logger.info("\n" + "\n".join(textwrap.wrap("""\
 The following streams you have NOT been subscribed to,
diff --git a/zulip/__init__.py b/zulip/__init__.py
index 7aba507..79a2ed9 100644
--- a/zulip/__init__.py
+++ b/zulip/__init__.py
@@ -245,7 +245,7 @@ class Client(object):
     def do_api_query(self, orig_request, url, method="POST", longpolling = False):
         request = {}
 
-        for (key, val) in orig_request.iteritems():
+        for (key, val) in six.iteritems(orig_request):
             if not (isinstance(val, str) or isinstance(val, six.text_type)):
                 request[key] = simplejson.dumps(val)
             else: