diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f15683fd5..9cb20bade 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,13 +14,13 @@ jobs:
         include:
           # Recent Rubies and Rails
           - ruby-version: '3.2'
-            rails-version: '7.0'
+            rails-version: '7.1'
           - ruby-version: '3.1'
-            rails-version: '7.0'
+            rails-version: '7.1'
           - ruby-version: '3.0'
-            rails-version: '7.0'
+            rails-version: '7.1'
           - ruby-version: '2.7'
-            rails-version: '7.0'
+            rails-version: '7.1'
           - ruby-version: '2.6'
             rails-version: '6.1'
           - ruby-version: '2.6'
diff --git a/Gemfile b/Gemfile
index e3ceac989..e30d1d431 100644
--- a/Gemfile
+++ b/Gemfile
@@ -88,6 +88,7 @@ end
 group :development, :test do
   if RUBY_VERSION < '3.0'
     gem 'rubocop', '~> 0.40.0', require: false
+    gem 'rdoc', '6.3.3', require: false
   else
     gem 'rubocop', '~> 1.56.0', require: false
     gem 'rubocop-minitest', '~> 0.31.0', require: false
diff --git a/active_model_serializers.gemspec b/active_model_serializers.gemspec
index 2d1855e8d..602cec3fc 100644
--- a/active_model_serializers.gemspec
+++ b/active_model_serializers.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.1'
 
-  rails_versions = ['>= 4.1', '< 7.1']
+  rails_versions = ['>= 4.1']
   spec.add_runtime_dependency 'activemodel', rails_versions
   # 'activesupport', rails_versions
   # 'builder'