diff --git a/Gemfile b/Gemfile
index f5aa100..ca155ba 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,4 +4,4 @@ git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
 gem 'mime-types', '~> 3.1'
 gem 'sinatra', '~> 2.0.2'
-gem 'twilio-ruby', '~> 5.10.3'
+gem 'twilio-ruby', '~> 6.4.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index b6180bd..38b6fbe 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,29 +1,33 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    faraday (0.15.2)
-      multipart-post (>= 1.2, < 3)
-    jwt (2.1.0)
+    faraday (2.7.10)
+      faraday-net_http (>= 2.0, < 3.1)
+      ruby2_keywords (>= 0.0.4)
+    faraday-net_http (3.0.2)
+    jwt (2.7.1)
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.3.0)
-    multipart-post (2.0.0)
+    mini_portile2 (2.8.4)
     mustermann (1.0.2)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.15.3)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
+    racc (1.7.1)
     rack (2.0.5)
     rack-protection (2.0.2)
       rack
+    ruby2_keywords (0.0.5)
     sinatra (2.0.2)
       mustermann (~> 1.0)
       rack (~> 2.0)
       rack-protection (= 2.0.2)
       tilt (~> 2.0)
     tilt (2.0.8)
-    twilio-ruby (5.10.3)
-      faraday (~> 0.9)
-      jwt (>= 1.5, <= 2.5)
+    twilio-ruby (6.4.0)
+      faraday (>= 0.9, < 3.0)
+      jwt (>= 1.5, < 3.0)
       nokogiri (>= 1.6, < 2.0)
 
 PLATFORMS
@@ -32,7 +36,7 @@ PLATFORMS
 DEPENDENCIES
   mime-types (~> 3.1)
   sinatra (~> 2.0.2)
-  twilio-ruby (~> 5.10.3)
+  twilio-ruby (~> 6.4.0)
 
 BUNDLED WITH
    1.16.1