diff --git a/Gemfile.lock b/Gemfile.lock
index d26d555..0b5e59f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -120,7 +120,9 @@ GEM
       mimemagic (~> 0.3.2)
     maruku (0.7.3)
     method_source (1.0.0)
-    mimemagic (0.3.4)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
@@ -136,7 +138,7 @@ GEM
     popper_js (1.16.0)
     public_suffix (4.0.4)
     puma (3.12.4)
-    rack (2.2.2)
+    rack (2.2.6.2)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.2)