diff --git a/graphene_django/converter.py b/graphene_django/converter.py
index 3f8511c..715c122 100644
--- a/graphene_django/converter.py
+++ b/graphene_django/converter.py
@@ -66,6 +66,27 @@ def convert_django_field(field, registry=None):
         (field, field.__class__))
 
 
+def get_phone_number_field():
+    try:
+        from phonenumber_field.formfields import PhoneNumberField
+        return PhoneNumberField
+    except:
+        try:
+            return models.DurationField
+        except:
+            pass
+    return models.CharField
+
+
+def get_duration_field():
+    try:
+        return models.DurationField
+    except:
+        return models.CharField
+
+
+@convert_django_field.register(get_phone_number_field())
+@convert_django_field.register(get_duration_field())
 @convert_django_field.register(models.CharField)
 @convert_django_field.register(models.TextField)
 @convert_django_field.register(models.EmailField)