diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index e830375..fbea868 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -24,9 +24,8 @@ jobs:
         os:
           - ubuntu
         ruby:
-          - "2.7"
+          - "3.2"
         gemfile:
-          - gemfiles/rails_5_2.gemfile
           - gemfiles/rails_6_0.gemfile
           - gemfiles/rails_6_1.gemfile
           - gemfiles/rails_7_0.gemfile
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 31105ac..948ab67 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -24,9 +24,9 @@ jobs:
         os:
           - ubuntu
         ruby:
-          - "2.7"
           - "3.0"
           - "3.1"
+          - "3.2"
         gemfile:
           - gemfiles/rails_6_0.gemfile
           - gemfiles/rails_6_1.gemfile
diff --git a/Appraisals b/Appraisals
index 620f10b..dc73554 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,12 +1,4 @@
 
-appraise "rails_5_2" do
-  version = "~> 5.2.0"
-  gem "activesupport", version
-  gem "actionpack", version
-  gem "activerecord", version
-  gem "railties", version
-end
-
 appraise "rails_6_0" do
   version = "~> 6.0.0"
   gem "activesupport", version
diff --git a/active_record_tweaks.gemspec b/active_record_tweaks.gemspec
index 17cc2c6..63628fa 100644
--- a/active_record_tweaks.gemspec
+++ b/active_record_tweaks.gemspec
@@ -27,11 +27,11 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency "activerecord", ">= 5.2.0", "< 8.0.0"
+  s.add_dependency "activerecord", ">= 6.0.0", "< 8.0.0"
 
   s.add_development_dependency "bundler", ">= 1.0.0"
   s.add_development_dependency "rake", ">= 10.0", "<= 14.0"
-  s.add_development_dependency "appraisal", "~> 2.0"
+  s.add_development_dependency "appraisal", "~> 2.0", ">= 2.5.0"
   s.add_development_dependency "rspec", "~> 3.0"
   s.add_development_dependency "rspec-its", "~> 1.0"
   s.add_development_dependency "sqlite3", ">= 1.3"
diff --git a/gemfiles/rails_5_2.gemfile b/gemfiles/rails_5_2.gemfile
deleted file mode 100644
index 869de8c..0000000
--- a/gemfiles/rails_5_2.gemfile
+++ /dev/null
@@ -1,10 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "activesupport", "~> 5.2.0"
-gem "actionpack", "~> 5.2.0"
-gem "activerecord", "~> 5.2.0"
-gem "railties", "~> 5.2.0"
-
-gemspec path: "../"