diff --git a/Gemfile b/Gemfile
index 8e7c1db..ac9390d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,7 +25,7 @@ gem 'mini_magick', '~> 4.9.5'
 gem 'omniauth', '~> 1.9.0'
 gem 'omniauth-google-oauth2', '~> 0.8.0'
 gem 'pg', '~> 1.1.4'
-gem 'puma', '~> 4.3.5'
+gem 'puma', '~> 4.3.12'
 gem 'rack-cors', '~> 1.0.5'
 gem 'rails', '~> 5.2.3'
 gem 'sass-rails', '~> 5.0.7'
diff --git a/Gemfile.lock b/Gemfile.lock
index f9436ff..9f20f64 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -186,7 +186,7 @@ GEM
     multi_json (1.14.1)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
     nokogiri (1.11.5)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -216,7 +216,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (3.1.1)
-    puma (4.3.5)
+    puma (4.3.12)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -382,7 +382,7 @@ DEPENDENCIES
   omniauth-google-oauth2 (~> 0.8.0)
   pg (~> 1.1.4)
   pry (~> 0.12.2)
-  puma (~> 4.3.5)
+  puma (~> 4.3.12)
   rack-cors (~> 1.0.5)
   rails (~> 5.2.3)
   rspec-rails (~> 3.8.2)