diff --git a/Gemfile.lock b/Gemfile.lock
index 2d089ed..e0bd870 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     fastimage (2.1.0)
     imgkit (1.6.1)
-    mini_magick (4.8.0)
+    mini_magick (4.9.4)
     redcarpet (3.4.0)
     wkhtmltoimage-binary (0.12.4)