diff --git a/Gemfile b/Gemfile
index 742858c..1f5ebbb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem "pry-byebug"
 current_ruby_version = Gem::Version.new(RUBY_VERSION)
 
 if current_ruby_version < Gem::Version.new("2.7.0")
-  gem "concurrent-ruby", "1.3.7"
+  gem "concurrent-ruby", "1.3.8"
 end
 
 if current_ruby_version < Gem::Version.new("3.1.0")