diff --git a/zipline/finance/blotter.py b/zipline/finance/blotter.py
index 9d5ab894..adeb7554 100644
--- a/zipline/finance/blotter.py
+++ b/zipline/finance/blotter.py
@@ -19,7 +19,7 @@ from copy import copy
 from logbook import Logger
 from collections import defaultdict
 
-from six import text_type
+from six import text_type, iteritems
 from six.moves import filter
 
 import zipline.errors
@@ -423,7 +423,7 @@ class Order(object):
     def __getstate__(self):
 
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems()
+            {k: v for k, v in iteritems(self.__dict__)
                 if not k.startswith('_')}
 
         state_dict['_status'] = self._status
diff --git a/zipline/finance/commission.py b/zipline/finance/commission.py
index c35f8b1e..3b92c9fa 100644
--- a/zipline/finance/commission.py
+++ b/zipline/finance/commission.py
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from six import iteritems
+
 from zipline.utils.serialization_utils import (
     VERSION_LABEL
 )
@@ -57,7 +59,7 @@ class PerShare(object):
     def __getstate__(self):
 
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems()
+            {k: v for k, v in iteritems(self.__dict__)
                 if not k.startswith('_')}
 
         STATE_VERSION = 1
@@ -105,7 +107,7 @@ class PerTrade(object):
     def __getstate__(self):
 
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems()
+            {k: v for k, v in iteritems(self.__dict__)
                 if not k.startswith('_')}
 
         STATE_VERSION = 1
@@ -153,7 +155,7 @@ class PerDollar(object):
     def __getstate__(self):
 
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems()
+            {k: v for k, v in iteritems(self.__dict__)
                 if not k.startswith('_')}
 
         STATE_VERSION = 1
diff --git a/zipline/finance/performance/period.py b/zipline/finance/performance/period.py
index 7ad6eb35..2238151f 100644
--- a/zipline/finance/performance/period.py
+++ b/zipline/finance/performance/period.py
@@ -581,7 +581,7 @@ class PerformancePeriod(object):
 
     def __getstate__(self):
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems()
+            {k: v for k, v in iteritems(self.__dict__)
                 if not k.startswith('_')}
 
         state_dict['_portfolio_store'] = self._portfolio_store
diff --git a/zipline/finance/performance/tracker.py b/zipline/finance/performance/tracker.py
index 6b947389..4657d155 100644
--- a/zipline/finance/performance/tracker.py
+++ b/zipline/finance/performance/tracker.py
@@ -60,6 +60,7 @@ Performance Tracking
 from __future__ import division
 import logbook
 import pickle
+from six import iteritems
 
 import numpy as np
 import pandas as pd
@@ -490,7 +491,7 @@ class PerformanceTracker(object):
 
     def __getstate__(self):
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems()
+            {k: v for k, v in iteritems(self.__dict__)
                 if not k.startswith('_')}
 
         state_dict['dividend_frame'] = pickle.dumps(self.dividend_frame)
diff --git a/zipline/finance/risk/cumulative.py b/zipline/finance/risk/cumulative.py
index 71a5bbe9..d7aca4bb 100644
--- a/zipline/finance/risk/cumulative.py
+++ b/zipline/finance/risk/cumulative.py
@@ -461,7 +461,7 @@ algorithm_returns ({algo_count}) in range {start} : {end} on {dt}"
 
     def __getstate__(self):
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems() if
+            {k: v for k, v in iteritems(self.__dict__) if
                 (not k.startswith('_') and not k == 'treasury_curves')}
 
         STATE_VERSION = 1
diff --git a/zipline/finance/risk/period.py b/zipline/finance/risk/period.py
index 7fe92353..c53f278c 100644
--- a/zipline/finance/risk/period.py
+++ b/zipline/finance/risk/period.py
@@ -311,7 +311,7 @@ class RiskMetricsPeriod(object):
 
     def __getstate__(self):
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems() if
+            {k: v for k, v in iteritems(self.__dict__) if
              (not k.startswith('_') and not k == 'treasury_curves')}
 
         STATE_VERSION = 1
diff --git a/zipline/finance/risk/report.py b/zipline/finance/risk/report.py
index 925d4c81..8a43d613 100644
--- a/zipline/finance/risk/report.py
+++ b/zipline/finance/risk/report.py
@@ -58,6 +58,7 @@ Risk Report
 import logbook
 import datetime
 from dateutil.relativedelta import relativedelta
+from six import iteritems
 
 from . period import RiskMetricsPeriod
 
@@ -145,7 +146,7 @@ class RiskReport(object):
 
     def __getstate__(self):
         state_dict = \
-            {k: v for k, v in self.__dict__.iteritems()
+            {k: v for k, v in iteritems(self.__dict__)
                 if not k.startswith('_')}
 
         if '_dividend_count' in dir(self):