diff --git a/re-former/Gemfile b/re-former/Gemfile
index d3eff43a..41a6ec17 100644
--- a/re-former/Gemfile
+++ b/re-former/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.1.3'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3', '~> 1.4'
 # Use Puma as the app server
-gem 'puma', '~> 5.0'
+gem 'puma', '~> 5.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/re-former/Gemfile.lock b/re-former/Gemfile.lock
index c9d1feaf..82e513d7 100644
--- a/re-former/Gemfile.lock
+++ b/re-former/Gemfile.lock
@@ -97,7 +97,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (1.0.0)
-    mimemagic (0.3.5)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.5.0)
     minitest (5.14.4)
@@ -107,7 +109,7 @@ GEM
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
     public_suffix (4.0.6)
-    puma (5.2.2)
+    puma (5.3.1)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -209,7 +211,7 @@ DEPENDENCIES
   capybara (>= 3.26)
   jbuilder (~> 2.7)
   listen (~> 3.3)
-  puma (~> 5.0)
+  puma (~> 5.3)
   rack-mini-profiler (~> 2.0)
   rails (~> 6.1.3)
   sass-rails (>= 6)