diff --git a/users/Gemfile b/users/Gemfile
index 68148ef1..39626029 100644
--- a/users/Gemfile
+++ b/users/Gemfile
@@ -11,7 +11,7 @@ gem 'rails', '~> 5.1.4'
 # Use sqlite3 as the database for Active Record
 gem 'pg'
 # Use Puma as the app server
-gem 'puma', '~> 3.7'
+gem 'puma', '~> 3.12'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/users/Gemfile.lock b/users/Gemfile.lock
index 58f8e29f..fde46d51 100644
--- a/users/Gemfile.lock
+++ b/users/Gemfile.lock
@@ -117,7 +117,7 @@ GEM
       pry (~> 0.9)
       slop (~> 3.0)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (3.12.4)
     rack (2.1.1)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -219,7 +219,7 @@ DEPENDENCIES
   pry
   pry-byebug
   pry-remote
-  puma (~> 3.7)
+  puma (~> 3.12)
   rails (~> 5.1.4)
   redis (~> 3.0)
   sass-rails (~> 5.0)