Java Error when using depends_on with condition in docker compose

In version 2.1 of the Docker Compose file the ability to add conditional dependencies was added, however, it does not work with pycharm as a Java error is thrown. For example, this docker compose file (taken from the docker documentation) works:

version: '2'
services:
  web:
    build: .
    depends_on:
      - db
      - redis
  redis:
    image: redis
  db:
    image: postgres

but then changing the dependencies to conditional:

version: '2.1'
services:
  web:
    build: .
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_started
  redis:
    image: redis
  db:
    image: redis
    healthcheck:
      test: "exit 0"

results in an error from pycharm when trying to run in web:

Cannot deserialize instance of `java.util.ArrayList` out of START_OBJECT token
 at [Source: UNKNOWN; line: -1, column: -1] (through reference chain: com.intellij.docker.compose.configuration.beans.v2.DockerComposeConfigurationV2["services"]->java.util.LinkedHashMap["web"]->com.intellij.docker.compose.configuration.beans.v2.DockerComposeServiceV2["depends_on"])

I'm using pycharm 2018.2.3 professional, docker-compose 1.21.2 and docker 18.06.1-ce.