diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index 7068483b56..49dd88c4f0 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -772,13 +772,16 @@ class OrganizationSerializer(BaseSerializer):
 
 class ProjectOptionsSerializer(BaseSerializer):
 
+    scm_clean = serializers.NullBooleanField(default=False)
+    scm_delete_on_update = serializers.NullBooleanField(default=False)
+
     class Meta:
         fields = ('*', 'local_path', 'scm_type', 'scm_url', 'scm_branch',
                   'scm_clean', 'scm_delete_on_update', 'credential')
         extra_kwargs = {
             'scm_type': {
-                'allow_null': True
-            }
+                'allow_null': True,
+            },
         }
 
     def get_related(self, obj):
@@ -791,6 +794,12 @@ class ProjectOptionsSerializer(BaseSerializer):
     def validate_scm_type(self, value):
         return value or u''
 
+    def validate_scm_clean(self, value):
+        return bool(value)
+
+    def validate_scm_delete_on_update(self, value):
+        return bool(value)
+
     def validate(self, attrs):
         errors = {}
 
@@ -823,6 +832,7 @@ class ProjectOptionsSerializer(BaseSerializer):
 class ProjectSerializer(UnifiedJobTemplateSerializer, ProjectOptionsSerializer):
 
     scm_delete_on_next_update = serializers.BooleanField(read_only=True)
+    scm_update_on_launch = serializers.NullBooleanField(default=False)
     status = serializers.ChoiceField(choices=Project.PROJECT_STATUS_CHOICES, read_only=True, required=False)
     last_update_failed = serializers.BooleanField(read_only=True)
     last_updated = serializers.DateTimeField(read_only=True)
@@ -832,7 +842,9 @@ class ProjectSerializer(UnifiedJobTemplateSerializer, ProjectOptionsSerializer):
         fields = ('*', 'scm_delete_on_next_update', 'scm_update_on_launch',
                   'scm_update_cache_timeout') + \
                  ('last_update_failed', 'last_updated')  # Backwards compatibility
-        
+
+    def clean_scm_update_on_launch(self, value):
+        return bool(value)
 
     def get_related(self, obj):
         res = super(ProjectSerializer, self).get_related(obj)