diff --git a/chrono/api/views.py b/chrono/api/views.py
index 03c20a89..f22caeca 100644
--- a/chrono/api/views.py
+++ b/chrono/api/views.py
@@ -304,7 +304,7 @@ class SlotSerializer(serializers.Serializer):
     '''
     payload to fill one slot. The slot (event id) is in the URL.
     '''
-    label = serializers.CharField(max_length=150, allow_blank=True) #, required=False)
+    label = serializers.CharField(max_length=250, allow_blank=True) #, required=False)
     user_name = serializers.CharField(max_length=250, allow_blank=True) #, required=False)
     backoffice_url = serializers.URLField(allow_blank=True) # , required=False)
     count = serializers.IntegerField(min_value=1) # , required=False)