diff --git a/project/boh_api/serializers.py b/project/boh_api/serializers.py
index c8ddd7b8..b2c90ecf 100644
--- a/project/boh_api/serializers.py
+++ b/project/boh_api/serializers.py
@@ -9,18 +9,49 @@
 class UserSerializer(serializers.ModelSerializer):
     class Meta:
         model = get_user_model()
-        fields = ('id', 'username', 'first_name', 'last_name', 'email', 'is_active', 'last_login')
+        fields = ['id', 'username', 'first_name', 'last_name', 'email', 'is_active', 'last_login']
         read_only_fields = fields
 
 
 class TagSerializer(serializers.ModelSerializer):
     class Meta:
         model = models.Tag
+        fields = ['id', 'name', 'color', 'description']
+
+
+class PersonSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = models.Person
+        fields = ['id', 'first_name', 'last_name', 'email', 'role', 'phone_work', 'phone_mobile', 'job_title']
 
 
 class OrganizationSerializer(serializers.ModelSerializer):
+    people = PersonSerializer(many = True, read_only = True)
+
     class Meta:
         model = models.Organization
+        fields = ['id', 'name', 'description', 'people']
+
+
+class ActivityTypeSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = models.ActivityType
+        fields = ['id', 'name', 'documentation']
+
+
+class ActivitySerializer(serializers.ModelSerializer):
+    activity_type = ActivityTypeSerializer(read_only = True)
+    users = UserSerializer(many = True, read_only = True)
+
+    class Meta:
+        model = models.Activity
+        fields = ['id', 'status', 'description', 'open_date', 'close_date', 'duration', 'activity_type', 'engagement', 'users']
+
+
+class DataElementSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = models.DataElement
+        fields = ['id', 'name', 'description']
 
 
 class ApplicationSerializer(serializers.ModelSerializer):
@@ -35,13 +66,15 @@ def get_key(self, custom_field_value):
             return custom_field_value.custom_field.key
 
     threadfix_metrics = serializers.SerializerMethodField()
-    organization = OrganizationSerializer(read_only=True)
-    tags = TagSerializer(many=True, read_only=True)
-    custom_fields = ApplicationCustomFieldValueSerializer(source='applicationcustomfieldvalue_set', many=True, read_only=True)
+    organization = OrganizationSerializer(read_only = True)
+    tags = TagSerializer(many = True, read_only = True)
+    data_elements = DataElementSerializer(many = True, read_only = True)
+    custom_fields = ApplicationCustomFieldValueSerializer(source='applicationcustomfieldvalue_set', many = True, read_only = True)
+    people = PersonSerializer(many = True, read_only = True)
 
     class Meta:
         model = models.Application
-        fields = ['id', 'organization', 'name', 'description', 'business_criticality', 'platform', 'lifecycle', 'origin', 'user_records', 'revenue', 'external_audience', 'internet_accessible', 'threadfix_metrics', 'tags', 'custom_fields', 'people']
+        fields = ['id', 'organization', 'name', 'description', 'business_criticality', 'platform', 'lifecycle', 'origin', 'user_records', 'revenue', 'external_audience', 'internet_accessible', 'threadfix_metrics', 'tags', 'data_elements', 'custom_fields', 'people']
 
     def get_threadfix_metrics(self, application):
         try:
@@ -59,21 +92,11 @@ def get_threadfix_metrics(self, application):
             return None
 
 
-class PersonSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = models.Person
-
-
-class ActivitySerializer(serializers.ModelSerializer):
-    class Meta:
-        model = models.Activity
-
-
 class EngagementSerializer(serializers.ModelSerializer):
+    requestor = PersonSerializer(read_only = True)
+
     class Meta:
         model = models.Engagement
+        fields = ['id', 'status', 'start_date', 'end_date', 'description', 'open_date', 'close_date', 'duration', 'requestor', 'application']
 
 
-class ActivityTypeSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = models.ActivityType
diff --git a/project/project/settings/base.py b/project/project/settings/base.py
index 7ae60a0f..377bc97c 100644
--- a/project/project/settings/base.py
+++ b/project/project/settings/base.py
@@ -113,9 +113,7 @@
         'rest_framework.authentication.SessionAuthentication',
         'rest_framework.authentication.TokenAuthentication',
     ),
-    'DEFAULT_FILTER_BACKENDS': (
-        'rest_framework.filters.DjangoFilterBackend',
-    ),
+    'DEFAULT_FILTER_BACKENDS': ['django_filters.rest_framework.DjangoFilterBackend'],
     'DEFAULT_PERMISSION_CLASSES': (
         'rest_framework.permissions.IsAuthenticated',
     ),
@@ -123,5 +121,6 @@
         'rest_framework.renderers.JSONRenderer',
         'rest_framework.renderers.BrowsableAPIRenderer',
     ),
+    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
     'PAGE_SIZE': 25,
 }
diff --git a/requirements/base.txt b/requirements/base.txt
index 12a3d971..1f69613d 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,9 +1,9 @@
 Django==1.11.22
 django-formtools==1.0
-djangorestframework==3.4.7
-django-filter==1.1.0
+djangorestframework==3.10.1
+django-filter==2.2.0
 django-widget-tweaks==1.4.1
-Markdown==2.6.11
+Markdown==3.1.1
 phonenumbers==8.9.10
 Pygments==2.2.0
 pytz==2018.5