diff --git a/libclip/clip-gd/gd/gd_png.c b/libclip/clip-gd/gd/gd_png.c

index cd2c06e..6a57b76 100644

--- a/libclip/clip-gd/gd/gd_png.c

+++ b/libclip/clip-gd/gd/gd_png.c

@@ -292,7 +292,7 @@ gdImagePtr gdImageCreateFromPngCtx(gdIOCtx *infile)

                 png_color_16p histogram;

                 png_get_hIST(png_ptr, info_ptr, &histogram);

-                png_set_dither(png_ptr, palette, num_palette,

+                png_set_quantize(png_ptr, palette, num_palette,

                   max_screen_colors, histogram, 1);

             } else

 #endif

@@ -318,7 +318,7 @@ gdImagePtr gdImageCreateFromPngCtx(gdIOCtx *infile)

                 palette[2].red = palette[2].green = palette[2].blue = 128;

                 palette[3].red = palette[3].green = palette[3].blue = 64;

                 /* final argument (full_dither) *must* be 1: */

-                png_set_dither(png_ptr, palette, 256, 256, NULL, 1);

+                png_set_quantize(png_ptr, palette, 256, 256, NULL, 1);

 #else

                 /* allocate a 6x6x6 color cube, starting at index 0 or 1 */

                 idx = (transparent < 0)? 0 : 1;

@@ -332,7 +332,7 @@ gdImagePtr gdImageCreateFromPngCtx(gdIOCtx *infile)

                         }

                     }

                 }

-                png_set_dither(png_ptr, palette, idx, idx, NULL, 1);

+                png_set_quantize(png_ptr, palette, idx, idx, NULL, 1);

 #endif

             }

             break;