diff --git a/greenmine/scrum/models.py b/greenmine/scrum/models.py
index 1617a6e1..9ab9e882 100644
--- a/greenmine/scrum/models.py
+++ b/greenmine/scrum/models.py
@@ -204,7 +204,7 @@ class Milestone(models.Model):
     disponibility = models.FloatField(null=True, default=0.0)
     order = models.PositiveSmallIntegerField("Order", default=1)
 
-    tags = DictField(blank=True, null=True)
+    tags = PickledObjectField()
 
     def save(self, *args, **kwargs):
         if not self.slug:
@@ -287,8 +287,8 @@ class Change(models.Model):
     object_id = models.PositiveIntegerField()
     content_object = generic.GenericForeignKey('content_type', 'object_id')
 
-    data = DictField(blank=True, null=True)
-    tags = DictField(blank=True, null=True)
+    data = PickledObjectField()
+    tags = PickledObjectField()
 
 
 class ChangeAttachment(models.Model):
@@ -298,7 +298,7 @@ class ChangeAttachment(models.Model):
     created_date = models.DateTimeField(auto_now_add=True)
     attached_file = models.FileField(upload_to="files/msg", max_length=500,
                                      null=True, blank=True)
-    tags = DictField(blank=True, null=True)
+    tags = PickledObjectField()
 
 
 class Task(models.Model):
diff --git a/greenmine/scrum/serializers.py b/greenmine/scrum/serializers.py
index d766584d..724621b6 100644
--- a/greenmine/scrum/serializers.py
+++ b/greenmine/scrum/serializers.py
@@ -1,43 +1,77 @@
 from rest_framework import serializers
 
 from greenmine.scrum.models import *
+from picklefield.fields import dbsafe_encode, dbsafe_decode
+
+import json
+
+class PickleField(serializers.WritableField):
+    """
+    Pickle objects serializer.
+    """
+    def to_native(self, obj):
+        return obj
+
+    def from_native(self, data):
+        return json.loads(data)
+
 
 class ProjectSerializer(serializers.ModelSerializer):
+    tags = PickleField()
+
     class Meta:
         model = Project
         fields = ()
 
 
 class MilestoneSerializer(serializers.ModelSerializer):
+    tags = PickleField()
+
     class Meta:
         model = Milestone
         fields = ()
 
 
 class UserStorySerializer(serializers.ModelSerializer):
+    tags = PickleField()
+
     class Meta:
         model = UserStory
         fields = ()
 
 
 class ChangeSerializer(serializers.ModelSerializer):
+    tags = PickleField()
+
     class Meta:
         model = Change
         fields = ()
 
 
 class ChangeAttachmentSerializer(serializers.ModelSerializer):
+    tags = PickleField()
+
     class Meta:
         model = ChangeAttachment
         fields = ()
 
 
 class TaskSerializer(serializers.ModelSerializer):
+    tags = PickleField()
+
     class Meta:
         model = Task
         fields = ()
 
 
+class IssueSerializer(serializers.ModelSerializer):
+    tags = PickleField()
+
+    class Meta:
+        model = Issue
+        fields = ()
+
+
 class SeveritySerializer(serializers.ModelSerializer):
     class Meta:
         model = Severity