diff --git a/store-frontend/src/store-frontend-initial-state/Gemfile b/store-frontend/src/store-frontend-initial-state/Gemfile
index 271009de60..f3b1b9a2a7 100644
--- a/store-frontend/src/store-frontend-initial-state/Gemfile
+++ b/store-frontend/src/store-frontend-initial-state/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 5.2.5'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 3.12'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
diff --git a/store-frontend/src/store-frontend-initial-state/Gemfile.lock b/store-frontend/src/store-frontend-initial-state/Gemfile.lock
index 1739cccd96..5083213d52 100644
--- a/store-frontend/src/store-frontend-initial-state/Gemfile.lock
+++ b/store-frontend/src/store-frontend-initial-state/Gemfile.lock
@@ -263,7 +263,8 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.13.0)
     public_suffix (4.0.6)
-    puma (3.12.6)
+    puma (4.3.9)
+      nio4r (~> 2.0)
     rabl (0.14.5)
       activesupport (>= 2.3.14)
     racc (1.5.2)
@@ -387,7 +388,7 @@ DEPENDENCIES
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
   pry-byebug
-  puma (~> 3.12)
+  puma (~> 4.3)
   rails (~> 5.2.5)
   rails_semantic_logger
   sass-rails (~> 5.0)