diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index 48abac4..e14ed38
--- a/Gemfile
+++ b/Gemfile
@@ -2,4 +2,4 @@ source 'https://rubygems.org'
 gem 'dotenv'
 gem 'sinatra'
 gem 'sinatra-contrib'
-gem 'twilio-ruby', '5.0.0.rc18'
+gem 'twilio-ruby', '6.7.0'