diff --git a/Gemfile.lock b/Gemfile.lock
index d5a3497..f1ad2f4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,9 @@ GEM
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     method_source (0.9.2)
-    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)
@@ -116,7 +118,7 @@ GEM
     sqlite3 (1.4.1)
     thor (0.20.3)
     thread_safe (0.3.6)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     tzinfo-data (1.2019.1)
       tzinfo (>= 1.0.0)