diff --git a/lib/paperclip/blurhash_transcoder.rb b/lib/paperclip/blurhash_transcoder.rb
index 1c3a6df02..c22c20c57 100644
--- a/lib/paperclip/blurhash_transcoder.rb
+++ b/lib/paperclip/blurhash_transcoder.rb
@@ -5,7 +5,7 @@ module Paperclip
     def make
       return @file unless options[:style] == :small || options[:blurhash]
 
-      pixels   = convert(':source RGB:-', source: File.expand_path(@file.path)).unpack('C*')
+      pixels   = convert(':source -depth 8 RGB:-', source: File.expand_path(@file.path)).unpack('C*')
       geometry = options.fetch(:file_geometry_parser).from_file(@file)
 
       attachment.instance.blurhash = Blurhash.encode(geometry.width, geometry.height, pixels, **(options[:blurhash] || {}))