diff --git a/cbpi/__init__.py b/cbpi/__init__.py
index 9018f45..f1be778 100644
--- a/cbpi/__init__.py
+++ b/cbpi/__init__.py
@@ -1,3 +1,3 @@
-__version__ = "4.5.0.a2"
+__version__ = "4.5.0.a3"
 __codename__ = "Cross Country"
 
diff --git a/cbpi/api/step.py b/cbpi/api/step.py
index 3b81017..622c66d 100644
--- a/cbpi/api/step.py
+++ b/cbpi/api/step.py
@@ -46,7 +46,7 @@ class CBPiStep(CBPiBase):
         self.props = props
         self.cancel_reason: StepResult = None
         self.summary = ""
-        self.summary2 = None
+        self.summary2 = ""
         self.task = None
         self.running: bool = False
         self.logger = logging.getLogger(__name__)
diff --git a/cbpi/extension/mashstep/__init__.py b/cbpi/extension/mashstep/__init__.py
index 75e314f..2317039 100644
--- a/cbpi/extension/mashstep/__init__.py
+++ b/cbpi/extension/mashstep/__init__.py
@@ -385,7 +385,7 @@ class BoilStep(CBPiStep):
         self.dwelltime=5*60 #tested with 5 minutes -> not exactly 5 min due to accuracy of asyncio.sleep
         self.deviationlimit=0.3 # derived from a test
         #logging.warning(self.AutoTimer)
-        self.summary2=None
+        self.summary2=""
 
         self.kettle=self.get_kettle(self.props.get("Kettle", None))
         if self.kettle is not None:
@@ -436,7 +436,7 @@ class BoilStep(CBPiStep):
     async def on_stop(self):
         await self.timer.stop()
         self.summary = ""
-        self.summary2 = None
+        self.summary2 = ""
         self.kettle.target_temp = 0
         if self.AutoMode == True:
             await self.setAutoMode(False)