diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index a437088..af5236c 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby-version: [ '2.7', '3.0', '3.1']
-        rails: ['5_0', '5_1', '5_2', '6_0', '6_1', '7_0']  
+        rails: ['5_0', '5_1', '5_2', '6_0', '6_1', '7_0', '7_1']
         exclude:
           # exclude unsupported ruby versions: https://github.com/rails/rails/issues/40938
           - ruby-version: '3.0'
diff --git a/Appraisals b/Appraisals
index aff8851..1fbe806 100644
--- a/Appraisals
+++ b/Appraisals
@@ -40,3 +40,9 @@ appraise "activerecord_7_0" do
   gem "activesupport", "~> 7.0.0"
   gem "pg", "~> 1.1"
 end
+
+appraise "activerecord_7_1" do
+  gem "activerecord",  "~> 7.1.0"
+  gem "activesupport", "~> 7.1.0"
+  gem "pg", "~> 1.1"
+end
diff --git a/crypt_keeper.gemspec b/crypt_keeper.gemspec
index c742ebd..447825c 100644
--- a/crypt_keeper.gemspec
+++ b/crypt_keeper.gemspec
@@ -18,8 +18,8 @@ Gem::Specification.new do |gem|
 
   gem.post_install_message = "WARNING: CryptKeeper 2.0 contains breaking changes and may require you to reencrypt your data! Please view the README at https://github.com/jmazzi/crypt_keeper for more information."
 
-  gem.add_runtime_dependency 'activerecord',  '>= 4.2', '~> 7.0.0'
-  gem.add_runtime_dependency 'activesupport', '>= 4.2', '~> 7.0.0'
+  gem.add_runtime_dependency 'activerecord',  '>= 4.2', '< 7.2.0'
+  gem.add_runtime_dependency 'activesupport', '>= 4.2', '< 7.2.0'
 
   gem.add_development_dependency 'rspec',       '~> 3.5.0'
   gem.add_development_dependency 'guard',       '~> 2.6.1'
diff --git a/gemfiles/activerecord_7_1.gemfile b/gemfiles/activerecord_7_1.gemfile
new file mode 100644
index 0000000..663bb1e
--- /dev/null
+++ b/gemfiles/activerecord_7_1.gemfile
@@ -0,0 +1,9 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activerecord", "~> 7.1.0"
+gem "activesupport", "~> 7.1.0"
+gem "pg", "~> 1.1"
+
+gemspec :path => "../"
diff --git a/lib/crypt_keeper/model.rb b/lib/crypt_keeper/model.rb
index 7a18ed1..6b3ec33 100644
--- a/lib/crypt_keeper/model.rb
+++ b/lib/crypt_keeper/model.rb
@@ -69,7 +69,7 @@ def crypt_keeper(*args)
         end
 
         crypt_keeper_fields.each do |field|
-          serialize field, encryptor
+          serialize field, coder: encryptor
         end
       end