diff --git a/Gemfile.lock b/Gemfile.lock
index bc040a9..7557c7d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,36 +2,35 @@ PATH
   remote: .
   specs:
     rating (0.8.0)
-      activerecord (>= 4.2, < 6)
+      activerecord
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actionpack (5.2.3)
-      actionview (= 5.2.3)
-      activesupport (= 5.2.3)
+    actionpack (6.0.0)
+      actionview (= 6.0.0)
+      activesupport (= 6.0.0)
       rack (~> 2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.3)
-      activesupport (= 5.2.3)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actionview (6.0.0)
+      activesupport (= 6.0.0)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activemodel (5.2.3)
-      activesupport (= 5.2.3)
-    activerecord (5.2.3)
-      activemodel (= 5.2.3)
-      activesupport (= 5.2.3)
-      arel (>= 9.0)
-    activesupport (5.2.3)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activemodel (6.0.0)
+      activesupport (= 6.0.0)
+    activerecord (6.0.0)
+      activemodel (= 6.0.0)
+      activesupport (= 6.0.0)
+    activesupport (6.0.0)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    arel (9.0.0)
+      zeitwerk (~> 2.1, >= 2.1.8)
     ast (2.4.0)
     builder (3.2.3)
     byebug (11.0.1)
@@ -75,12 +74,12 @@ GEM
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.2.0)
       loofah (~> 2.2, >= 2.2.2)
-    railties (5.2.3)
-      actionpack (= 5.2.3)
-      activesupport (= 5.2.3)
+    railties (6.0.0)
+      actionpack (= 6.0.0)
+      activesupport (= 6.0.0)
       method_source
       rake (>= 0.8.7)
-      thor (>= 0.19.0, < 2.0)
+      thor (>= 0.20.3, < 2.0)
     rainbow (3.0.0)
     rake (13.0.0)
     rspec-core (3.8.2)
@@ -119,6 +118,7 @@ GEM
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     unicode-display_width (1.6.0)
+    zeitwerk (2.1.10)
 
 PLATFORMS
   ruby
diff --git a/rating.gemspec b/rating.gemspec
index f1ce840..f61b7f3 100644
--- a/rating.gemspec
+++ b/rating.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.test_files  = Dir['spec/**/*']
   spec.version     = Rating::VERSION
 
-  spec.add_dependency 'activerecord', '>= 4.2', '< 6'
+  spec.add_dependency 'activerecord'
 
   spec.add_development_dependency 'database_cleaner'
   spec.add_development_dependency 'factory_bot_rails'