diff --git a/Gemfile b/Gemfile
index 672e4c7..4cffcde 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem "hurley"
 gem "irb", "~> 1.17"
 gem "jruby-openssl", platforms: :jruby
 gem "kramdown", "~> 1.5"
-gem "launchy", "~> 2.4"
+gem "launchy", ">= 2.4", "< 4"
 gem "rake", "~> 13.0"
 gem "redcarpet", "~> 3.0"
 gem "rspec", "~> 3.1"