Command depreciation warning

[MattyTheHacker]

[DEPRECATED] The --path flag is deprecated because it relies on being remembered across bundler invocations, which bundler will no longer do in future versions. Instead please use bundle config set path '/opt/build/cache/bundle', and stop using this flag

[DEPRECATED] The --binstubs option will be removed in favor of bundle binstubs --all

Getting the above errors in the build log but can't seem to work out what's actually causing them...