diff --git a/Gemfile.lock b/Gemfile.lock
index 016e2a7..ffee956 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -93,7 +93,9 @@ GEM
     materialize-sass (1.0.0)
       autoprefixer-rails (>= 6.0.3)
     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)
@@ -164,7 +166,7 @@ GEM
     thor (0.20.3)
     thread_safe (0.3.6)
     tilt (2.0.9)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)