diff --git a/temporalio/lib/temporalio/version.rb b/temporalio/lib/temporalio/version.rb
index 6b2ec079..aea7f27a 100644
--- a/temporalio/lib/temporalio/version.rb
+++ b/temporalio/lib/temporalio/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Temporalio
-  VERSION = '1.3.0'
+  VERSION = '1.4.0'
 end