diff --git a/standardrb/Gemfile b/standardrb/Gemfile
index 8871ecc2..6fddd6ca 100644
--- a/standardrb/Gemfile
+++ b/standardrb/Gemfile
@@ -1,2 +1,2 @@
 source 'https://rubygems.org'
-gem 'standard', '~> 1.39.0'
+gem 'standard', '~> 1.40.0'