diff --git a/analytics/analytics/detectors/threshold_detector.py b/analytics/analytics/detectors/threshold_detector.py
index 4c71cc8..dc5320f 100644
--- a/analytics/analytics/detectors/threshold_detector.py
+++ b/analytics/analytics/detectors/threshold_detector.py
@@ -43,7 +43,7 @@ class ThresholdDetector(Detector):
         else:
             last_entry = dataframe_without_nans.iloc[-1]
             last_time = convert_pd_timestamp_to_ms(last_entry['timestamp'])
-            last_value = last_entry['value']
+            last_value = float(last_entry['value'])
             segment = { 'from': last_time, 'to': last_time, 'params': { value: last_value } }
 
             if condition == '>':