diff --git a/.github/workflows/rubyonrails.yml b/.github/workflows/rubyonrails.yml
index e928c08b..1a844e39 100644
--- a/.github/workflows/rubyonrails.yml
+++ b/.github/workflows/rubyonrails.yml
@@ -21,9 +21,9 @@
 name: "GitHub CI"
 on:
   push:
-    branches: ["devel"]
+    branches: ["master"]
   pull_request:
-    branches: ["devel"]
+    branches: ["master"]
 jobs:
   plugin_tests:
     strategy:
diff --git a/README.md b/README.md
index 7650e13d..ed824384 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ Features
 Dependencies
 ------------
   
-  * Redmine 4.2.0 or higher
+  * Redmine 5.0.0 or higher
 
 ### Full-text search (optional)
 
diff --git a/init.rb b/init.rb
index f97a7b3e..c1793906 100644
--- a/init.rb
+++ b/init.rb
@@ -29,7 +29,7 @@ Redmine::Plugin.register :redmine_dmsf do
   description 'Document Management System Features'
   version '3.0.6 devel'
   
-  requires_redmine version_or_higher: '4.2.0'
+  requires_redmine version_or_higher: '5.0.0'
 
   settings partial: 'settings/dmsf_settings',
             default: {