diff --git a/Gemfile.lock b/Gemfile.lock
index 040a0b1..adf2583 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -145,7 +145,9 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    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)
@@ -159,7 +161,7 @@ GEM
     pg (1.1.4)
     public_suffix (3.0.3)
     puma (3.12.6)
-    rack (2.2.3)
+    rack (2.2.6.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.2)