diff --git a/Formula/imagemagick@6.rb b/Formula/imagemagick@6.rb
index 92dd3fa6f4..6cf6e4c423 100644
--- a/Formula/imagemagick@6.rb
+++ b/Formula/imagemagick@6.rb
@@ -4,9 +4,9 @@ class ImagemagickAT6 < Formula
   # Please always keep the Homebrew mirror as the primary URL as the
   # ImageMagick site removes tarballs regularly which means we get issues
   # unnecessarily and older versions of the formula are broken.
-  url "https://dl.bintray.com/homebrew/mirror/imagemagick%406-6.9.9-19.tar.xz"
-  mirror "https://www.imagemagick.org/download/ImageMagick-6.9.9-19.tar.xz"
-  sha256 "330efe70c38d86b95337f67015c465c8d910d8e96632ee72e09017120546d1ab"
+  url "https://dl.bintray.com/homebrew/mirror/imagemagick%406-6.9.9-20.tar.xz"
+  mirror "https://www.imagemagick.org/download/ImageMagick-6.9.9-20.tar.xz"
+  sha256 "72131caaee1c673923709f7353b6731b43a2735b29110deac5121db403b07f0f"
 
   bottle do
     sha256 "ff0094009edf94bc9ff681328fd14d79c1caa0897e2d44949d83068787656309" => :high_sierra