diff --git a/boil_kettle/globals.h b/boil_kettle/globals.h
index ff4b0bb..a30f578 100644
--- a/boil_kettle/globals.h
+++ b/boil_kettle/globals.h
@@ -40,8 +40,8 @@ struct ConfigData {
   IPAddress ip;
   int interval;
   int period;
-  uint8_t threshold;
-  uint8_t hysteresis;
+  double threshold;
+  double hysteresis;
 };
 
 uint8_t KettleDuty = 0;