diff --git a/Gemfile b/Gemfile
index 21b7c90..fd0f6ea 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.1'
 # Use sqlite3 as the database for Active Record
 gem "sqlite3", "~> 1.3.6"
 # Use Puma as the app server
-gem 'puma', '~> 3.11'
+gem 'puma', '~> 3.12'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index 60a3ca6..7cf95fe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -225,7 +225,7 @@ GEM
     orm_adapter (0.5.0)
     popper_js (1.14.5)
     public_suffix (4.0.1)
-    puma (3.12.1)
+    puma (3.12.3)
     rack (2.0.7)
     rack-proxy (0.6.5)
       rack
@@ -362,7 +362,7 @@ DEPENDENCIES
   jquery-rails
   listen (>= 3.0.5, < 3.2)
   popper_js
-  puma (~> 3.11)
+  puma (~> 3.12)
   rails (~> 5.2.1)
   rsolr (>= 1.0, < 3)
   sass-rails (~> 5.0)