diff --git a/gemfiles/.bundle/config b/gemfiles/.bundle/config
deleted file mode 100644
index c127f802..00000000
--- a/gemfiles/.bundle/config
+++ /dev/null
@@ -1,2 +0,0 @@
----
-BUNDLE_RETRY: "1"
diff --git a/lib/vault/encrypted_model.rb b/lib/vault/encrypted_model.rb
index 7628010e..3aa2498f 100644
--- a/lib/vault/encrypted_model.rb
+++ b/lib/vault/encrypted_model.rb
@@ -69,13 +69,13 @@ def vault_attribute(vault_attr, options = {})
 
         # Getter
         define_method(vault_attr.to_s) do
-          __vault_load_attributes! unless @__vault_loaded
+          self.__vault_load_attributes! unless @__vault_loaded
           instance_variable_get("@#{vault_attr}")
         end
 
         # Setter
         define_method("#{vault_attr}=") do |value|
-          __vault_load_attributes! unless @__vault_loaded
+          self.__vault_load_attributes! unless @__vault_loaded
 
           # We always set it as changed without comparing with the current value
           # because we allow our held values to be mutated, so we need to assume
@@ -247,9 +247,11 @@ def __vault_persist_attributes!
         # If there are any changes to the model, update them all at once,
         # skipping any callbacks and validation. This is okay, because we are
         # already in a transaction due to the callback.
-        self.update_columns(changes) unless changes.empty?
+        if !changes.empty?
+          self.update_columns(changes)
+        end
 
-        true
+        return true
       end
 
       # Encrypt a single attribute using Vault and persist back onto the
@@ -264,7 +266,9 @@ def __vault_persist_attribute!(attribute, options)
         plaintext = instance_variable_get("@#{attribute}")
 
         # Apply the serialize to the plaintext value, if one exists
-        plaintext = serializer.encode(plaintext) if serializer
+        if serializer
+          plaintext = serializer.encode(plaintext)
+        end
 
         # Generate the ciphertext and store it back as an attribute
         ciphertext = Vault::Rails.encrypt(path, key, plaintext)
diff --git a/spec/dummy/app/models/person.rb b/spec/dummy/app/models/person.rb
index d477f71d..c52ccae2 100644
--- a/spec/dummy/app/models/person.rb
+++ b/spec/dummy/app/models/person.rb
@@ -1,4 +1,4 @@
-require 'binary_serializer'
+require "binary_serializer"
 
 class Person < ActiveRecord::Base
   include Vault::EncryptedModel
@@ -7,8 +7,8 @@ class Person < ActiveRecord::Base
 
   vault_attribute :credit_card,
     encrypted_column: :cc_encrypted,
-    path: 'credit-secrets',
-    key: 'people_credit_cards'
+    path: "credit-secrets",
+    key: "people_credit_cards"
 
   vault_attribute :details,
     serialize: :json
@@ -22,3 +22,4 @@ class Person < ActiveRecord::Base
 
   vault_attribute :non_ascii
 end
+
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 3f356c79..4dcf41fc 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,7 +1,7 @@
-$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
-require 'vault/rails'
+$LOAD_PATH.unshift File.expand_path("../../lib", __FILE__)
+require "vault/rails"
 
-require 'rspec'
+require "rspec"
 
 RSpec.configure do |config|
   # Prohibit using the should syntax
@@ -21,4 +21,4 @@
   config.order = 'random'
 end
 
-require File.expand_path('../dummy/config/environment.rb', __FILE__)
+require File.expand_path("../dummy/config/environment.rb", __FILE__)