diff --git a/Gemfile b/Gemfile
index d07c1bc..7c53338 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'rails', '~> 6.1.1'
 # Use postgresql as the database for Active Record
 gem 'pg', '~> 1.1'
 # Use Puma as the app server
-gem 'puma', '~> 5.0'
+gem 'puma', '~> 5.6'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/Gemfile.lock b/Gemfile.lock
index 5cfd63b..11efc07 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -78,7 +78,6 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (~> 1.5)
       xpath (~> 3.2)
-    childprocess (3.0.0)
     cliver (0.3.2)
     concurrent-ruby (1.1.7)
     crass (1.0.6)
@@ -180,7 +179,7 @@ GEM
     msgpack (1.3.3)
     multi_json (1.15.0)
     multipart-post (2.1.1)
-    nio4r (2.5.4)
+    nio4r (2.5.8)
     nokogiri (1.11.1)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -192,7 +191,7 @@ GEM
     pg (1.2.3)
     psych (3.3.0)
     public_suffix (4.0.6)
-    puma (5.1.1)
+    puma (5.6.4)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -274,7 +273,6 @@ GEM
       rake (>= 0.8.1)
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.2)
-    rubyzip (2.3.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
     sassc (2.4.0)
@@ -285,9 +283,6 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
-    selenium-webdriver (3.142.7)
-      childprocess (>= 0.5, < 4.0)
-      rubyzip (>= 1.2.2)
     semantic_range (2.3.1)
     signet (0.14.0)
       addressable (~> 2.3)
@@ -357,7 +352,7 @@ DEPENDENCIES
   listen (~> 3.3)
   on_container (~> 0.0.10)
   pg (~> 1.1)
-  puma (~> 5.0)
+  puma (~> 5.6)
   rack-mini-profiler (~> 2.0)
   rails (~> 6.1.1)
   reek (~> 6.0, >= 6.0.2)
@@ -365,7 +360,6 @@ DEPENDENCIES
   rubocop (~> 1.7)
   ruby-debug-ide (~> 0.7.2)
   sass-rails (>= 6)
-  selenium-webdriver (~> 3.142, >= 3.142.7)
   solargraph (~> 0.40.1)
   spring
   turbolinks (~> 5)