diff --git a/app/models/rails/keyserver/application_record.rb b/app/models/rails/keyserver/application_record.rb
index 3624053..f1ae4f2 100644
--- a/app/models/rails/keyserver/application_record.rb
+++ b/app/models/rails/keyserver/application_record.rb
@@ -1,6 +1,6 @@
 module Rails
   module Keyserver
-    class ApplicationRecord < ActiveRecord::Base
+    class ApplicationRecord < ::ActiveRecord::Base
       self.abstract_class = true
     end
   end
diff --git a/app/models/rails/keyserver/key.rb b/app/models/rails/keyserver/key.rb
index 63d8110..219dacc 100644
--- a/app/models/rails/keyserver/key.rb
+++ b/app/models/rails/keyserver/key.rb
@@ -1,8 +1,11 @@
 # frozen_string_literal: true
 
+require_dependency File.expand_path("application_record", __dir__)
+require_dependency File.expand_path("../../../../lib/rails/keyserver/engine", __dir__)
+
 module Rails
   module Keyserver
-    class Key < ApplicationRecord
+    class Key < ::Rails::Keyserver::ApplicationRecord
       class EncryptionKeyNotFoundException < RuntimeError; end
 
       include MySQLBinUUID::UUID
@@ -40,14 +43,14 @@ def save_fingerprint; end
       belongs_to :owner, polymorphic: true
 
       # XXX: key blankness should ideally be checked in attr_encrypted!
-      if Engine.config.encryption_key.blank?
+      if Rails::Keyserver::Engine.config.encryption_key.blank?
         raise EncryptionKeyNotFoundException,
-              "Engine.config.encryption_key is blank!"
+              "Rails::Keyserver::Engine.config.encryption_key is blank!"
       end
 
       attr_encrypted :private,
-                     key:  Engine.config.encryption_key,
-                     mode: Engine.config.try(:encryption_mode) || :per_attribute_iv
+                     key:  Rails::Keyserver::Engine.config.encryption_key,
+                     mode: Rails::Keyserver::Engine.config.try(:encryption_mode) || :per_attribute_iv
 
       scope :primary, -> {
         pkg = arel_table[:primary_key_grip]
@@ -87,3 +90,5 @@ def save_fingerprint; end
     end
   end
 end
+
+require File.expand_path("key/pgp", __dir__)
diff --git a/app/models/rails/keyserver/key/pgp.rb b/app/models/rails/keyserver/key/pgp.rb
index 0e4fefe..eb19aab 100644
--- a/app/models/rails/keyserver/key/pgp.rb
+++ b/app/models/rails/keyserver/key/pgp.rb
@@ -1,5 +1,8 @@
 # frozen_string_literal: true
 
+require File.expand_path("../key", __dir__)
+require File.expand_path("../application_record", __dir__)
+
 module Rails
   module Keyserver
     class Key
@@ -12,7 +15,7 @@ def self.extension
         end
 
         # TODO: These defaults belong in somewhere else?
-        Engine.config.key_host = nil
+        ::Rails::Keyserver::Engine.config.key_host = nil
 
         def derive_metadata_if_empty
           derive_metadata if metadata.blank?
diff --git a/lib/rails/keyserver.rb b/lib/rails/keyserver.rb
index 6386756..c0eca82 100644
--- a/lib/rails/keyserver.rb
+++ b/lib/rails/keyserver.rb
@@ -1,5 +1,12 @@
 # frozen_string_literal: true
 
+module Rails
+  module Keyserver
+  end
+end
+
+RK = Rails::Keyserver # development use? No, production use, too!
+
 require "rails/keyserver/engine"
 require "rails/keyserver/routes"
 require "mysql-binuuid-rails"
@@ -10,11 +17,3 @@
 # require "mail-gpg"
 require "attr_encrypted"
 # require "graphql"
-
-module Rails
-  module Keyserver
-    # Your code goes here...
-  end
-end
-
-RK = Rails::Keyserver # development use? No, production use, too!
diff --git a/lib/rails/keyserver/engine.rb b/lib/rails/keyserver/engine.rb
index 4f5c8ac..9ef53c8 100644
--- a/lib/rails/keyserver/engine.rb
+++ b/lib/rails/keyserver/engine.rb
@@ -9,9 +9,15 @@ class Engine < ::Rails::Engine
         g.fixture_replacement :factory_bot, dir: "spec/factories"
       end
 
+      config.to_prepare do
+        # pp Rails::Keyserver::Engine.config.encryption_key
+      end
+
       config.after_initialize do
       end
 
+      config.autoload_paths << "#{config.root}/lib"
+
       # URL:
       # https://blog.pivotal.io/labs/labs/leave-your-migrations-in-your-rails-engines
       initializer :append_migrations do |app|