diff --git a/src/octoprint/plugins/cura/profile.py b/src/octoprint/plugins/cura/profile.py
index ce492d9d..3b01f182 100644
--- a/src/octoprint/plugins/cura/profile.py
+++ b/src/octoprint/plugins/cura/profile.py
@@ -951,7 +951,7 @@ class Profile(object):
 				settings["extruderOffset[{extruder}].{axis}".format(extruder=extruder, axis=axis.upper())] = self.get("extruder_offset_{axis}{extruder}".format(extruder=extruder, axis=axis.lower()))
 
 		fanFullHeight = self.get_microns("fan_full_height")
-		settings["fanFullOnLayerNr"] = (fanFullHeight - settings["initialLayerThickness"] - 1) / settings["layerThickness"] + 1
+		settings["fanFullOnLayerNr"] = (fanFullHeight - settings["initialLayerThickness"] - 1) // settings["layerThickness"] + 1
 		if settings["fanFullOnLayerNr"] < 0:
 			settings["fanFullOnLayerNr"] = 0
 
diff --git a/src/octoprint/util/avr_isp/stk500v2.py b/src/octoprint/util/avr_isp/stk500v2.py
index 7cd99858..0fe59fe0 100644
--- a/src/octoprint/util/avr_isp/stk500v2.py
+++ b/src/octoprint/util/avr_isp/stk500v2.py
@@ -68,7 +68,7 @@ class Stk500v2(ispBase.IspBase):
 		else:
 			self.sendMessage([0x06, 0x00, 0x00, 0x00, 0x00])
 		
-		loadCount = (len(flashData) + pageSize - 1) / pageSize
+		loadCount = (len(flashData) + pageSize - 1) // pageSize
 		for i in range(0, loadCount):
 			recv = self.sendMessage([0x13, pageSize >> 8, pageSize & 0xFF, 0xc1, 0x0a, 0x40, 0x4c, 0x20, 0x00, 0x00] + flashData[(i * pageSize):(i * pageSize + pageSize)])
 			if self.progressCallback != None:
@@ -82,7 +82,7 @@ class Stk500v2(ispBase.IspBase):
 		else:
 			self.sendMessage([0x06, 0x00, 0x00, 0x00, 0x00])
 		
-		loadCount = (len(flashData) + 0xFF) / 0x100
+		loadCount = (len(flashData) + 0xFF) // 0x100
 		for i in range(0, loadCount):
 			recv = self.sendMessage([0x14, 0x01, 0x00, 0x20])[2:0x102]
 			if self.progressCallback != None: