diff --git a/views.py b/views.py
index 7d6dc3b..93397bd 100644
--- a/views.py
+++ b/views.py
@@ -262,8 +262,9 @@ class UpperLimitView(APIView):
             confidence_level=confidence_level,
         )
 
-        bayesian_count_ul = high
-        bayesian_count_ll = low
+        # because poisson_conf_interval returns lists
+        bayesian_count_ul = high[0]
+        bayesian_count_ll = low[0]
 
         bayesian_rate_ul = bayesian_count_ul / t / EEF  # count rate limits
         bayesian_rate_ll = bayesian_count_ll / t / EEF