diff --git a/Gemfile b/Gemfile
index 56b663b..f17058e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ ruby '2.5.3'
 gem 'rails', '~> 5.2.0'
 
 # API/Server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 gem 'grape'
 gem 'grape-swagger'
 gem 'grape-middleware-logger'
diff --git a/Gemfile.lock b/Gemfile.lock
index 0b7c7fa..0f468ca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -288,7 +288,9 @@ GEM
     marcel (0.3.2)
       mimemagic (~> 0.3.2)
     method_source (0.9.2)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -320,7 +322,7 @@ GEM
     pry-rails (0.3.6)
       pry (>= 0.10.4)
     public_suffix (3.0.2)
-    puma (3.12.0)
+    puma (3.12.6)
     rack (2.0.7)
     rack-accept (0.4.5)
       rack (>= 0.4)
@@ -552,7 +554,7 @@ DEPENDENCIES
   pg (>= 0.18, < 2.0)
   pry-byebug
   pry-rails
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.0)
   ransack
   react-rails