diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c5fa5ce..9cae87e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        redmine: ["4.2", "5.0", "5.1"]
+        redmine: ["5.0", "5.1"]
         db: ["sqlite", "mysql", "postgresql"]
         include:
           - ruby: "2.7"
diff --git a/README.md b/README.md
index c04ab00..52fb0ea 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # Redmine Risks
 
 [![Latest Release](https://img.shields.io/github/release/eXolnet/redmine-risks.svg?style=flat-square)](https://github.com/eXolnet/redmine-risks/releases)
-[![Redmine Compatibility](https://img.shields.io/static/v1?label=redmine&message=4.2.x-5.1.x&color=blue&style=flat-square)](https://www.redmine.org/plugins/redmine_risks)
+[![Redmine Compatibility](https://img.shields.io/static/v1?label=redmine&message=5.0.x-5.1.x&color=blue&style=flat-square)](https://www.redmine.org/plugins/redmine_risks)
 [![Software License](https://img.shields.io/badge/license-MIT-8469ad.svg?style=flat-square)](LICENSE)
 [![Build Status](https://img.shields.io/github/actions/workflow/status/eXolnet/redmine_risks/tests.yml?label=tests&style=flat-square)](https://github.com/eXolnet/redmine_risks/actions?query=workflow%3Atests)
 [![Maintainability](https://api.codeclimate.com/v1/badges/85dc8be921f40a688900/maintainability)](https://codeclimate.com/github/eXolnet/redmine-risks/maintainability)
@@ -10,7 +10,7 @@ Manage the results of the qualitative risk analysis, quantitative risk analysis,
 
 ## Compatibility
 
-This plugin version is compatible only with Redmine 4.2 and later.
+This plugin version is compatible only with Redmine 5.0 and later.
 
 ## Installation
 
diff --git a/init.rb b/init.rb
index 7b493ac..709bf6d 100644
--- a/init.rb
+++ b/init.rb
@@ -10,7 +10,7 @@
   url 'https://github.com/eXolnet/redmine_risks'
   author_url 'https://www.exolnet.com'
 
-  requires_redmine :version_or_higher => '4.2'
+  requires_redmine :version_or_higher => '5.0'
 
   menu :project_menu, :risks, { :controller => 'risks', :action => 'index' }, :caption => :label_risks, :before => :settings, :param => :project_id
   menu :project_menu, :new_risk, { :controller => 'risks', :action => 'new' }, :caption => :label_new_risk, :after => :new_wiki_sub, :param => :project_id, :parent => :new_object