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```docker run -it prefecthq/prefect:latest-python3.6  /bin/bash
root@c281a603b87e:/# prefect version
0.14.12```

```(.venv) C:\Users\groche\source&gt; docker run -it prefecthq/prefect:latest-python3.6  /bin/bash
Unable to find image 'prefecthq/prefect:latest-python3.6' locally
latest-python3.6: Pulling from prefecthq/prefect
75646c2fb410: Already exists
62342603b9a2: Already exists
0bdd7747fb18: Pull complete
c8ecc0b9e8c5: Pull complete
e51cfb6f5145: Pull complete
e813c6a2bec6: Pull complete
56280ee759f3: Pull complete
Digest: sha256:b663f215c0dccedf2ee432ebaafa8d636e4aa424fa6e35e42c516385fa6718d6
Status: Downloaded newer image for prefecthq/prefect:latest-python3.6
root@2838bac2f4a5:/# prefect version
0.14.15```
Looks like your docker image is outdated.

aha, thanks probably, I never thought I pulled it at all, as I built it.

Can't live without the 0.14.15 goodness, even on ye olde redhat cluster