diff --git a/.ruby-version b/.ruby-version
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-ruby-2.5.1
+ruby-3.2.1
diff --git a/Dockerfile b/Dockerfile
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@
 # A simple Jenkins dashboard view
 #
 
-FROM ruby:2.5
+FROM ruby:3.2
 MAINTAINER Sébastien Santoro aka Dereckson <dereckson+nasqueron-docker@espace-win.org>
 
 #
diff --git a/Gemfile b/Gemfile
--- a/Gemfile
+++ b/Gemfile
@@ -1,13 +1,14 @@
 # frozen_string_literal: true
 
 source 'http://rubygems.org'
-gem 'activesupport'
+gem 'activesupport', '~> 7.0', '>= 7.0.4.3'
 gem 'hashie'
 gem 'i18n'
 gem 'json'
 gem 'rest-client'
-gem 'sinatra', '>= 2.0.4'
+gem 'sinatra', '~> 3.0', '>= 3.0.4'
+gem 'thin'
 
 group :development do
-  gem 'shotgun', '<= 0.9.2'
+  gem 'shotgun', '~> 0.9', '>= 0.9.2'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,59 +1,69 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (5.2.1)
+    activesupport (7.0.4.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    concurrent-ruby (1.0.5)
-    domain_name (0.5.20180417)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+    concurrent-ruby (1.2.2)
+    daemons (1.4.1)
+    domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
-    hashie (3.6.0)
-    http-cookie (1.0.3)
+    eventmachine (1.2.7)
+    hashie (5.0.0)
+    http-accept (1.7.0)
+    http-cookie (1.0.5)
       domain_name (~> 0.5)
-    i18n (1.1.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
-    mime-types (3.2.2)
+    json (2.6.3)
+    mime-types (3.4.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2018.0812)
-    minitest (5.11.3)
-    mustermann (1.0.3)
+    mime-types-data (3.2023.0218.1)
+    minitest (5.18.0)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
-    rack (2.0.5)
-    rack-protection (2.0.4)
+    rack (2.2.6.4)
+    rack-protection (3.0.5)
       rack
-    rest-client (2.0.2)
+    rest-client (2.1.0)
+      http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
+    ruby2_keywords (0.0.5)
     shotgun (0.9.2)
       rack (>= 1.0)
-    sinatra (2.0.4)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.4)
+    sinatra (3.0.5)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.5)
       tilt (~> 2.0)
-    thread_safe (0.3.6)
-    tilt (2.0.8)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
+    thin (1.8.1)
+      daemons (~> 1.0, >= 1.0.9)
+      eventmachine (~> 1.0, >= 1.0.4)
+      rack (>= 1, < 3)
+    tilt (2.1.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.5)
+    unf_ext (0.0.8.2)
 
 PLATFORMS
-  ruby
+  x86_64-linux
 
 DEPENDENCIES
-  activesupport
+  activesupport (~> 7.0, >= 7.0.4.3)
   hashie
   i18n
   json
   rest-client
-  shotgun (<= 0.9.2)
-  sinatra (>= 2.0.4)
+  shotgun (~> 0.9, >= 0.9.2)
+  sinatra (~> 3.0, >= 3.0.4)
+  thin
 
 BUNDLED WITH
-   1.16.2
+   2.4.6