diff --git a/apps/establishment/serializers/back.py b/apps/establishment/serializers/back.py
index 841f0b80..8f9f7e6d 100644
--- a/apps/establishment/serializers/back.py
+++ b/apps/establishment/serializers/back.py
@@ -430,7 +430,7 @@ class EmployeeBackSerializers(PhoneMixinSerializer, serializers.ModelSerializer)
         ]
         extra_kwargs = {
             'phone': {'write_only': True},
-            'available_for_events': {'required': False}
+            'available_for_events': {'required': False, 'allow_null': True}
         }