logstash 5.0 fails plugin install

[Solty]

I updated to logstash.noarch 1:5.0.0-1 on RHEL 6.
after the update i went to install logstash-output-slack and got the following:

bin/logstash-plugin install logstash-output-slack
Validating logstash-output-slack
Installing logstash-output-slack
Plugin version conflict, aborting
ERROR: Installation Aborted, message: Bundler could not find compatible versions for gem "logstash-codec-plain":
In snapshot (Gemfile.lock):
logstash-codec-plain (= 3.0.2)

In Gemfile:
logstash-input-s3 (>= 0) java depends on
logstash-mixin-aws (>= 0) java depends on
logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

logstash-output-slack (>= 0) java depends on
  logstash-codec-plain (>= 1.0.0, ~> 2.0.0) java

logstash-input-s3 (>= 0) java depends on
  logstash-mixin-aws (>= 0) java depends on
    logstash-codec-plain (>= 0) java

Running bundle update will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.
Bundler could not find compatible versions for gem "logstash-core":
In snapshot (Gemfile.lock):
logstash-core (= 5.0.0)

In Gemfile:
logstash-core-plugin-api (>= 0) java depends on
logstash-core (= 5.0.0) java

logstash-output-slack (>= 0) java depends on
  logstash-core (< 2.0.0, >= 1.4.0) java

logstash-core (>= 0) java

Running bundle update will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

is there a workaround or update coming?

[w4-sglim]

Try this as a workaround

http {
  http_method => "post"
  url => "https://hooks.slack.com/services/..."
  mapping => [
    "text", "Your message: %{message}"
  ]
}