diff --git a/Gemfile b/Gemfile
index b602f67..e75e0d0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
 source "https://rubygems.org"
 
 gemspec
-gem 'concurrent-ruby', '~> 1.3', '>= 1.3.4''
\ No newline at end of file
+gem 'concurrent-ruby', '~> 1.3', '>= 1.3.4'
\ No newline at end of file