diff --git a/api/serializers.py b/api/serializers.py
index 8276732..37e59bf 100644
--- a/api/serializers.py
+++ b/api/serializers.py
@@ -19,10 +19,10 @@ class GroupSerializer(serializers.ModelSerializer):
 class AcquisitionSerializer(serializers.ModelSerializer):
     class Meta:
         model = models.Acquisition
-        fields = '__all__'
+        exclude = ['user']
 
 
 class TypeTrackingSerializer(serializers.ModelSerializer):
     class Meta:
         model = models.TypeTracking
-        fields = '__all__'
+        exclude = ['user']