diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c77cfb0..adb9644 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,6 @@ jobs:
       fail-fast: false
       matrix:
         entry:
-          - { ruby: 'jruby-9.4.5.0', mongo: 'mongo:4.4', mongoid: '5' }
           - { ruby: '2.7.1', mongo: 'mongo:4.4', mongoid: '6' }
           - { ruby: '3.0.5', mongo: 'mongo:4.4', mongoid: '6' }
           - { ruby: '3.1.3', mongo: 'mongo:4.4', mongoid: '6' }
diff --git a/Gemfile b/Gemfile
index 3d67848..752316d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,19 +4,15 @@ source 'http://rubygems.org'
 
 gemspec
 
-case version = ENV['MONGOID_VERSION'] || '7.0'
+case version = ENV['MONGOID_VERSION'] || '8'
 when 'HEAD'
   gem 'mongoid', github: 'mongodb/mongoid'
+when /^8/
+  gem 'mongoid', '~> 8'
 when /^7/
-  gem 'mongoid', '~> 7.0'
+  gem 'mongoid', '~> 7'
 when /^6/
-  gem 'mongoid', '~> 6.0'
-when /^5/
-  gem 'mongoid', '~> 5.0'
-when /^4/
-  gem 'mongoid', '~> 4.0'
-when /^3/
-  gem 'mongoid', '~> 3.1'
+  gem 'mongoid', '~> 6'
 else
   gem 'mongoid', version
 end