diff --git a/Gemfile.lock b/Gemfile.lock
index 3ba106a..958b38b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -117,7 +117,9 @@ GEM
       mimemagic (~> 0.3.2)
     memoist (0.16.0)
     method_source (0.9.2)
-    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)
@@ -156,7 +158,8 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (3.1.0)
-    puma (3.12.1)
+    puma (4.3.8)
+      nio4r (~> 2.0)
     raabro (1.1.6)
     rack (2.0.7)
     rack-protection (2.0.5)