diff --git a/arkindex/dataimport/serializers/workers.py b/arkindex/dataimport/serializers/workers.py
index f76fc7e93e9673dce22e80cb253d2baaba04396a..589d2c38beec0a63e0cf5235093c3595b7a8d478 100644
--- a/arkindex/dataimport/serializers/workers.py
+++ b/arkindex/dataimport/serializers/workers.py
@@ -47,7 +47,7 @@ class WorkerSerializer(WorkerLightSerializer):
 class UserConfigurationFieldType(Enum):
     Int = 'int'
     Float = 'float'
-    String = 'str'
+    String = 'string'
     Enum = 'enum'