--- kindlecomicconverter/image.py	2022-01-24 22:43:36.220691413 +0100
+++ ../kcc-5.5.2-orig/kindlecomicconverter/image.py	2019-10-21 17:27:38.000000000 +0200
@@ -255,7 +255,7 @@
         if gamma == 1.0:
             self.image = ImageOps.autocontrast(self.image)
         else:
-            self.image = ImageOps.autocontrast(Image.eval(self.image, lambda a: 255 * (a / 255.) ** gamma))
+            self.image = ImageOps.autocontrast(Image.eval(self.image, lambda a: int(255 * (a / 255.) ** gamma)))

     def quantizeImage(self):
         colors = len(self.palette) // 3