diff --git a/misfitapp/extras.py b/misfitapp/extras.py
index 5d446e3..09a4071 100644
--- a/misfitapp/extras.py
+++ b/misfitapp/extras.py
@@ -1,6 +1,9 @@
 import re
 import datetime
 
+# Maximum number of days Misfit will allow in a date range api request
+DAYS_IN_CHUNK = 30
+
 def cc_to_underscore(name):
     """ Convert camelCase name to under_score """
     s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
@@ -12,7 +15,7 @@ def cc_to_underscore_keys(dictionary):
     return dict((cc_to_underscore(key), val) for key, val in dictionary.items())
 
 
-def chunkify_dates(start, end, days_in_chunk):
+def chunkify_dates(start, end, days_in_chunk=DAYS_IN_CHUNK):
     """
     Return a list of tuples that chunks the date range into ranges
     of length days_in_chunk.
@@ -20,7 +23,7 @@ def chunkify_dates(start, end, days_in_chunk):
     chunks = []
     s = start
     e = start + datetime.timedelta(days=days_in_chunk)
-    while e - datetime.timedelta(days=30) < end:
+    while e - datetime.timedelta(days=days_in_chunk) < end:
         e = min(e, end)
         chunks.append((s, e))
         s = e + datetime.timedelta(days=1)
diff --git a/misfitapp/tasks.py b/misfitapp/tasks.py
index 1f8bb1d..5b37e78 100644
--- a/misfitapp/tasks.py
+++ b/misfitapp/tasks.py
@@ -22,7 +22,7 @@
     Summary,
     Goal
 )
-from .extras import cc_to_underscore_keys
+from .extras import cc_to_underscore_keys, chunkify_dates
 
 logger = logging.getLogger(__name__)
 
@@ -231,13 +231,15 @@ def update_summaries(date_ranges):
             continue
 
         misfit = utils.create_misfit(access_token=mfuser.access_token)
-        summaries = misfit.summary(detail=True, **date_range)
-        for summary in summaries:
-            data = cc_to_underscore_keys(summary.data)
-            s, created = Summary.objects.get_or_create(user_id=mfuser.user_id,
-                                                       date=data['date'],
-                                                       defaults=data)
-            if not created:
-                for attr, val in data.items():
-                    setattr(s, attr, val)
-                s.save()
+
+        for start, end in chunkify_dates(date_range['start_date'], date_range['end_date']):
+            summaries = misfit.summary(detail=True, start_date=start, end_date=end)
+            for summary in summaries:
+                data = cc_to_underscore_keys(summary.data)
+                s, created = Summary.objects.get_or_create(user_id=mfuser.user_id,
+                                                           date=data['date'],
+                                                           defaults=data)
+                if not created:
+                    for attr, val in data.items():
+                        setattr(s, attr, val)
+                    s.save()