diff --git a/Gemfile b/Gemfile
index 40b127e..348400a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,7 +16,7 @@ gem 'delayed_job_active_record'
 gem 'daemons'
 gem "whenever", require: false
 
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 3.12'
 gem 'uglifier', '>= 4.0.0'
 gem 'figaro', '>= 1.1.1'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 223ddd8..5ff9650 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -580,7 +580,7 @@ GEM
       actionmailer (>= 3)
       premailer (~> 1.7, >= 1.7.9)
     public_suffix (3.1.1)
-    puma (3.12.1)
+    puma (3.12.3)
     rack (2.0.7)
     rack-attack (5.4.2)
       rack (>= 1.0, < 3)
@@ -806,7 +806,7 @@ DEPENDENCIES
   figaro (>= 1.1.1)
   letter_opener_web (~> 1.3.0)
   listen (~> 3.1.0)
-  puma (~> 3.0)
+  puma (~> 3.12)
   spring
   spring-watcher-listen (~> 2.0.0)
   uglifier (>= 4.0.0)