diff --git a/README.md b/README.md
index 9c2a673..3edbe01 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ It can convert comics to different formats to fit your various devices.
 * reads CBR (RAR), CBZ (ZIP), CB7 (7Z), CBT (TAR), PDF, EPUB, MOBI and plain directory
 * saves processed comics in ZIP archive format or TAR
 * images can be converted to JPEG, PNG, TIFF, WEBP, AVIF, or 4-Bit BMP (16 colors) file format
-* rotate, flip, adjust brightness/contrast, adjust levels (Photoshop-like) or grayscale images
+* rotate, adjust brightness/contrast, adjust levels (Photoshop-like) or grayscale images
 * resize filters (NearestNeighbor, Box, Linear, MitchellNetravali, CatmullRom, Gaussian, Lanczos)
 * export covers from comics
 * create thumbnails from covers by [FreeDesktop](http://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html) specification
@@ -79,8 +79,6 @@ This is what it looks like in the PCManFM file manager:
             Convert images to grayscale (monochromatic) (default "false")
         --rotate
             Rotate images, valid values are 0, 90, 180, 270 (default "0")
-        --flip
-            Flip images, valid values are none, horizontal, vertical (default "none")
         --brightness
             Adjust the brightness of the images, must be in the range (-100, 100) (default "0")
         --contrast
diff --git a/cbconvert.go b/cbconvert.go
index 6994058..5ac82f4 100644
--- a/cbconvert.go
+++ b/cbconvert.go
@@ -120,8 +120,6 @@ type Options struct {
 	Grayscale bool
 	// Rotate images, valid values are 0, 90, 180, 270
 	Rotate int
-	// Flip images, valid values are none, horizontal, vertical
-	Flip string
 	// Adjust the brightness of the images, must be in the range (-100, 100)
 	Brightness int
 	// Adjust the contrast of the images, must be in the range (-100, 100)
@@ -496,7 +494,7 @@ func (c *Convertor) imageConvert(ctx context.Context, img image.Image, index int
 	return nil
 }
 
-// imageTransform transforms image (resize, rotate, flip, brightness, contrast).
+// imageTransform transforms image (resize, rotate, brightness, contrast).
 func (c *Convertor) imageTransform(img image.Image) image.Image {
 	var i = img
 
@@ -519,15 +517,6 @@ func (c *Convertor) imageTransform(img image.Image) image.Image {
 		}
 	}
 
-	if c.Opts.Flip != "none" {
-		switch c.Opts.Flip {
-		case "horizontal":
-			i = imaging.FlipH(i)
-		case "vertical":
-			i = imaging.FlipV(i)
-		}
-	}
-
 	if c.Opts.Brightness != 0 {
 		i = imaging.AdjustBrightness(i, float64(c.Opts.Brightness))
 	}
diff --git a/cmd/cbconvert/main.go b/cmd/cbconvert/main.go
index 9836c01..027df75 100644
--- a/cmd/cbconvert/main.go
+++ b/cmd/cbconvert/main.go
@@ -180,7 +180,6 @@ func parseFlags() (cbconvert.Options, []string) {
 	convert.BoolVar(&opts.NoConvert, "no-convert", false, "Do not transform or convert images")
 	convert.BoolVar(&opts.Grayscale, "grayscale", false, "Convert images to grayscale (monochromatic)")
 	convert.IntVar(&opts.Rotate, "rotate", 0, "Rotate images, valid values are 0, 90, 180, 270")
-	convert.StringVar(&opts.Flip, "flip", "none", "Flip images, valid values are none, horizontal, vertical")
 	convert.IntVar(&opts.Brightness, "brightness", 0, "Adjust the brightness of the images, must be in the range (-100, 100)")
 	convert.IntVar(&opts.Contrast, "contrast", 0, "Adjust the contrast of the images, must be in the range (-100, 100)")
 	convert.StringVar(&opts.Suffix, "suffix", "", "Add suffix to file basename")