diff --git a/Gemfile.lock b/Gemfile.lock
index 2d657a9..3ce0e02 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -224,7 +224,9 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2019.1009)
-    mimemagic (0.4.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.10.1)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)