diff --git a/bin/dither/Gemfile.lock b/bin/dither/Gemfile.lock
index b04196e..2c2361c 100644
--- a/bin/dither/Gemfile.lock
+++ b/bin/dither/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     base64 (0.2.0)
-    mini_magick (4.12.0)
+    mini_magick (5.0.1)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     rack (3.0.9.1)