diff --git a/Gemfile.lock b/Gemfile.lock
index 8b9fa42..9c6afbd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -110,7 +110,9 @@ GEM
     microformats (4.0.7)
       json
       nokogiri
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -130,7 +132,8 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    puma (3.12.0)
+    puma (4.3.9)
+      nio4r (~> 2.0)
     rack (2.0.5)
     rack-mini-profiler (1.0.0)
       rack (>= 1.2.0)