diff --git a/diffcrypt.gemspec b/diffcrypt.gemspec
index e28ed9a..3ae32cd 100644
--- a/diffcrypt.gemspec
+++ b/diffcrypt.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
   spec.executables = %w[diffcrypt]
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'activesupport', '>= 6.0', '< 7.1'
+  spec.add_runtime_dependency 'activesupport', '>= 6.0', '< 7.2'
   spec.add_runtime_dependency 'thor', '>= 0.20', '< 2'
   spec.metadata['rubygems_mfa_required'] = 'true'
 end
diff --git a/lib/diffcrypt/encryptor.rb b/lib/diffcrypt/encryptor.rb
index 2bfc98b..eefc4d1 100644
--- a/lib/diffcrypt/encryptor.rb
+++ b/lib/diffcrypt/encryptor.rb
@@ -6,6 +6,7 @@
 require 'securerandom'
 require 'yaml'
 
+require 'active_support' # NOTE: This is required because of a bug in 7.1 which needs deprecation libs
 require 'active_support/message_encryptor'
 
 require_relative './version'
diff --git a/lib/diffcrypt/rails/encrypted_configuration.rb b/lib/diffcrypt/rails/encrypted_configuration.rb
index 63a3583..405531f 100644
--- a/lib/diffcrypt/rails/encrypted_configuration.rb
+++ b/lib/diffcrypt/rails/encrypted_configuration.rb
@@ -68,6 +68,14 @@ def key
         read_env_key || read_key_file || handle_missing_key
       end
 
+      # It's required since the commit https://github.com/rails/rails/commit/1740b1f2cb8104435b6041ec6bfaabe58a6d74e6
+      # Returns truthy if #key is truthy. Returns falsy otherwise. Unlike #key,
+      # does not raise MissingKeyError when +raise_if_missing_key+ is true.
+      # @return [Boolean]
+      def key?
+        !!(read_env_key || read_key_file)
+      end
+
       def change(&block)
         writing read, &block
       end
diff --git a/test/rails_test.rb b/test/rails_test.rb
index 73d54f4..360da83 100644
--- a/test/rails_test.rb
+++ b/test/rails_test.rb
@@ -7,7 +7,8 @@
 
 RAILS_VERSIONS = %w[
   6.1.7.7
-  7.0.8.1
+  7.0.8.3
+  7.1.3.3
 ].freeze
 
 RAILS_FLAGS = %w[