diff --git a/lib/messagebird.rb b/lib/messagebird.rb
index 1ce4ca6..db5f7ac 100644
--- a/lib/messagebird.rb
+++ b/lib/messagebird.rb
@@ -2,7 +2,7 @@
 $:.unshift(libdir) unless $:.include?(libdir)
 
 module MessageBird
-  CLIENT_VERSION = '1.3.3'
+  CLIENT_VERSION = '1.4.0'
   ENDPOINT       = 'https://rest.messagebird.com'
 end