diff --git a/Gemfile.lock b/Gemfile.lock
index 5daba99..76d2575 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -126,7 +126,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -230,7 +232,7 @@ GEM
     tty-screen (0.6.5)
     tty-tree (0.3.0)
     tty-which (0.4.1)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)