diff --git a/categories/fields.py b/categories/fields.py
new file mode 100644
index 0000000..fde87ca
--- /dev/null
+++ b/categories/fields.py
@@ -0,0 +1,11 @@
+from django.db.models import ForeignKey, ManyToManyField
+from categories.models import Category
+
+class CategoryM2MField(ManyToManyField):
+    def __init__(self, **kwargs):
+        super(CategoryM2MField, self).__init__(to=Category, **kwargs)
+    
+    
+class CategoryFKField(ForeignKey):
+    def __init__(self, **kwargs):
+        super(CategoryFKField, self).__init__(to=Category, **kwargs)
\ No newline at end of file