sidekiq-middleware and jruby

Gemfile

source "https://rubygems.org"

gem "sidekiq", "~> 2.17.0"
gem "sidekiq-middleware"

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    celluloid (0.15.2)
      timers (~> 1.1.0)
    connection_pool (2.0.0)
    json (1.8.1-java)
    redis (3.0.7)
    redis-namespace (1.4.1)
      redis (~> 3.0.4)
    sidekiq (2.17.7)
      celluloid (>= 0.15.2)
      connection_pool (>= 1.0.0)
      json
      redis (>= 3.0.6)
      redis-namespace (>= 1.3.1)
    sidekiq-middleware (0.3.0)
      sidekiq (>= 2.12.4)
    timers (1.1.0)

PLATFORMS
  java

DEPENDENCIES
  sidekiq (~> 2.17.0)
  sidekiq-middleware