diff --git a/src/effects/Brightness.cpp b/src/effects/Brightness.cpp
index 497667e1..8a791f8f 100644
--- a/src/effects/Brightness.cpp
+++ b/src/effects/Brightness.cpp
@@ -91,7 +91,7 @@ std::shared_ptr<Frame> Brightness::GetFrame(std::shared_ptr<Frame> frame, int64_
 		int A = pixels[byte_index + 3];
 
 		// Adjust the contrast
-		int factor = (259 * (contrast_value + 255)) / (255 * (259 - contrast_value));
+		float factor = (259 * (contrast_value + 255)) / (255 * (259 - contrast_value));
 		R = constrain((factor * (R - 128)) + 128);
 		G = constrain((factor * (G - 128)) + 128);
 		B = constrain((factor * (B - 128)) + 128);
diff --git a/src/effects/Mask.cpp b/src/effects/Mask.cpp
index d0fed124..f54abc11 100644
--- a/src/effects/Mask.cpp
+++ b/src/effects/Mask.cpp
@@ -88,7 +88,7 @@ void Mask::set_grayscale_mask(std::shared_ptr<QImage> mask_frame_image, int widt
 		int gray_value = qGray(R, G, B);
 
 		// Adjust the contrast
-		int factor = (259 * (contrast + 255)) / (255 * (259 - contrast));
+		float factor = (259 * (contrast + 255)) / (255 * (259 - contrast));
 		gray_value = constrain((factor * (gray_value - 128)) + 128);
 
 		// Adjust the brightness