diff --git a/Gemfile.lock b/Gemfile.lock
index 93a4bfc..28c9758 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,7 +86,9 @@ GEM
     marcel (0.3.2)
       mimemagic (~> 0.3.2)
     method_source (0.9.0)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -94,7 +96,7 @@ GEM
     nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
     public_suffix (3.0.2)
-    rack (2.0.5)
+    rack (2.2.6.2)
     rack-test (1.0.0)
       rack (>= 1.0, < 3)
     rails (5.2.0)