diff --git a/.ci.gemfile b/.ci.gemfile
index 2298a49..aa513cb 100644
--- a/.ci.gemfile
+++ b/.ci.gemfile
@@ -50,6 +50,10 @@ unless RUBY_VERSION < '2.4' && RUBY_ENGINE == 'jruby'
   gem 'pandoc-ruby'
 end
 
+if RUBY_ENGINE == 'jruby' && RUBY_VERSION >= '2.6'
+  gem 'jar-dependencies', '0.4.1'
+end
+
 if RUBY_ENGINE == 'jruby'
   gem 'haml', '< 6'
 else