diff --git a/Gemfile b/Gemfile
index bd21667..ec49534 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ ruby ::File.read('.ruby-version').split('-').last
 
 # Application Dependencies
 gem 'activesupport'
-gem 'puma'
+gem 'puma', '>= 5.6.8'
 gem 'sinatra', require: false
 gem 'sinatra-contrib'
 gem 'sinatra-flash'
diff --git a/Gemfile.lock b/Gemfile.lock
index b022d90..f6672f9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
     minitest (5.11.3)
     multi_json (1.13.1)
     mustermann (1.0.3)
-    nio4r (2.4.0)
+    nio4r (2.7.0)
     nokogiri (1.10.3)
       mini_portile2 (~> 2.4.0)
     parallel (1.17.0)
@@ -117,7 +117,7 @@ GEM
     pg (0.21.0)
     progressbar (1.10.1)
     public_suffix (3.1.1)
-    puma (4.0.1)
+    puma (6.4.2)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-protection (2.0.5)
@@ -231,7 +231,7 @@ DEPENDENCIES
   faker
   pg
   progressbar
-  puma
+  puma (>= 5.6.8)
   rack-test
   racksh
   rake
@@ -247,7 +247,7 @@ DEPENDENCIES
   standalone_migrations
 
 RUBY VERSION
-   ruby 2.6.3p62
+   ruby 2.7.8p225
 
 BUNDLED WITH
-   2.0.2
+   2.1.4