diff --git a/laborious/activities/api.py b/laborious/activities/api.py
index a80909e..4e4144f 100644
--- a/laborious/activities/api.py
+++ b/laborious/activities/api.py
@@ -194,7 +194,7 @@ class API(SientiaMonitoring):
         raw_prediction_tags = pi_web_api_output_config['prediction_tags']
         raw_confidence_tags = pi_web_api_output_config['confidence_tags']
         prediction_tags = list[str](raw_prediction_tags.values())
-        confidence_tags = list[str](raw_confidence_tags.values())
+        confidence_tags = list(raw_confidence_tags.values())
 
         core_labels = self.get_core_labels(metadata)