diff --git a/Gemfile.lock b/Gemfile.lock
index d5a3497..6cf4e7a 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)
@@ -70,7 +72,7 @@ GEM
     nokogiri (1.10.5-x86-mingw32)
       mini_portile2 (~> 2.4.0)
     puma (3.12.1)
-    rack (2.1.2)
+    rack (2.2.6.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.1.7)