diff --git a/Gemfile.lock b/Gemfile.lock
index 9f984da..e65e4d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -40,7 +40,9 @@ GEM
     io-like (0.3.0)
     macaddr (1.7.2)
       systemu (~> 2.6.5)
-    mimemagic (0.3.3)
+    mimemagic (0.4.3)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -50,6 +52,7 @@ GEM
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
+    rake (13.0.6)
     regexp_parser (1.5.1)
     require_all (2.0.0)
     rspec (3.8.0)
@@ -74,7 +77,7 @@ GEM
       capybara (~> 3.2)
     systemu (2.6.5)
     thread_safe (0.3.6)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uuid (2.3.9)
       macaddr (~> 1.0)