diff --git a/Gemfile.lock b/Gemfile.lock
index 52fceb6..c59d9fd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -191,7 +191,9 @@ GEM
       mimemagic (~> 0.3.2)
     memcachier (0.0.2)
     method_source (0.9.0)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.8.0)
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
@@ -213,7 +215,8 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (3.0.1)
-    puma (3.11.0)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     rack (2.0.5)
     rack-cache (1.7.1)
       rack (>= 0.4)