Problems with json 1.8.3. make failed, exit code 2 about dokku-api HOT 8 CLOSED

-----> Cleaning up...
-----> Building dokku-api from herokuish...
-----> Adding BUILD_ENV to build environment...
-----> Ruby app detected
-----> Compiling Ruby/Rack
-----> Using Ruby version: ruby-2.4.4
-----> Installing dependencies using bundler 1.15.2
       Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin -j4 --deployment
       Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.16.2). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
       You are trying to install in deployment mode after changing
       your Gemfile. Run `bundle install` elsewhere and add the
       updated Gemfile.lock to version control.
       
       The dependencies in your gemfile changed
       
       You have added to the Gemfile:
       * json (~> 1.8.6)
       
       You have deleted from the Gemfile:
       * json (~> 1.8.3)
       Bundler Output: Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.16.2). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
       You are trying to install in deployment mode after changing
       your Gemfile. Run `bundle install` elsewhere and add the
       updated Gemfile.lock to version control.
       
       The dependencies in your gemfile changed
       
       You have added to the Gemfile:
       * json (~> 1.8.6)
       
       You have deleted from the Gemfile:
       * json (~> 1.8.3)
       !
       !     Failed to install gems via Bundler.
       !