diff --git a/.github/workflows/kari.yml b/.github/workflows/kari.yml
index 65b8031..d113c13 100644
--- a/.github/workflows/kari.yml
+++ b/.github/workflows/kari.yml
@@ -12,8 +12,8 @@ jobs:
 
     strategy:
       matrix:
-        gemfile: [ rails_6_1, rails_7_0, rails_7_1 ]
-        ruby: [ 2.7, 3.1, 3.2 ]
+        gemfile: [ rails_7_0, rails_7_1, rails_7_2 ]
+        ruby: [ 3.1, 3.2, 3.3 ]
 
     env:
       DATABASE_URL: postgres://postgres:postgres@localhost:5432
diff --git a/Appraisals b/Appraisals
index 661f21c..9e69945 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,9 +1,5 @@
 # frozen_string_literal: true
 
-appraise "rails-6-1" do
-  gem "rails", "~> 6.1"
-end
-
 appraise "rails-7-0" do
   gem "rails", "~> 7.0"
 end
@@ -11,3 +7,7 @@ end
 appraise "rails-7-1" do
   gem "rails", "~> 7.1"
 end
+
+appraise "rails-7-2" do
+  gem "rails", "~> 7.2"
+end
diff --git a/gemfiles/rails_6_1.gemfile b/gemfiles/rails_7_2.gemfile
similarity index 84%
rename from gemfiles/rails_6_1.gemfile
rename to gemfiles/rails_7_2.gemfile
index 742bf67..f475979 100644
--- a/gemfiles/rails_6_1.gemfile
+++ b/gemfiles/rails_7_2.gemfile
@@ -4,6 +4,6 @@
 
 source "https://rubygems.org"
 
-gem "rails", "~> 6.1"
+gem "rails", "~> 7.2"
 
 gemspec path: "../"
diff --git a/kari.gemspec b/kari.gemspec
index 87cbbef..e7f31e4 100644
--- a/kari.gemspec
+++ b/kari.gemspec
@@ -30,11 +30,11 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "pg", "~> 1.2"
-  spec.add_dependency "rails", ">= 6.1", "< 7.2"
+  spec.add_dependency "rails", ">= 7.0", "< 8.0"
 
-  spec.add_development_dependency "appraisal", "~> 2.4"
+  spec.add_development_dependency "appraisal", "~> 2.5"
   spec.add_development_dependency "rake", "~> 13.0"
-  spec.add_development_dependency "rspec-rails", "~> 4.0"
+  spec.add_development_dependency "rspec-rails", "~> 7.0"
   spec.add_development_dependency "rubocop", "~> 1.21"
   spec.add_development_dependency "rubocop-rails", "~> 2.16"
   spec.add_development_dependency "rubocop-rspec", "~> 2.13"
diff --git a/spec/unit/kari/extensions/schema_dumper_spec.rb b/spec/unit/kari/extensions/schema_dumper_spec.rb
index 301716a..7ef18c9 100644
--- a/spec/unit/kari/extensions/schema_dumper_spec.rb
+++ b/spec/unit/kari/extensions/schema_dumper_spec.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require "spec_helper"
+require "ostruct"
 
 RSpec.describe Kari::Extensions::SchemaDumper do
   class MySchemaDumper