diff --git a/Gemfile.lock b/Gemfile.lock
index 1d0d48a29..1c0af6136 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -223,7 +223,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     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)
@@ -308,7 +310,8 @@ GEM
       i18n (>= 0.5.0)
       railties (>= 3.0.0)
     public_suffix (3.0.3)
-    puma (3.12.1)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     pundit (2.0.1)
       activesupport (>= 3.0.0)
     rack (2.0.7)