How change helper_image setting for gitlab runner?

Hello!
Base GitLab runner helper does not respect /etc/hosts, bu we need it (image is missing /etc/nsswitch.conf).
I have added setting helper_image = "megakrutak/gitlab-runner-helper" to config.toml (for docker executor)
But, this setting is not load and not apply automatically (I check it by specify an incorrect image name - ci is works as before).

[[runners]]
name = “Android runner”
url = “https://myhost.net/gitlab/ci
token = “xxx”
executor = “docker”
[runners.docker]
tls_verify = false
image = “openjdk:8-jdk”
privileged = true
disable_cache = true
shm_size = 0
extra_hosts = [“myhost.net:1.1.1.1”]
helper_image = “megakrutak/gitlab-runner-helper”
[runners.cache]

GitLab version 10.2.2
Gitlab Runner version 9.4.2

How refresh this setting for runner or may be I need clear some cache?
Thanks!

Relevant (might offer solution): https://gitlab.com/gitlab-org/gitlab-runner/issues/2959