Nexon posted a patch for GMS version 135 upgrade to version 137.
You may download this patch from their official site and begin creating your pre-patcher now, alternatively, you may use their precompiled manual patcher here.
Extractions and database updates will be forthcoming (if supported)!
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Notify missed it. I don't think Notify is programmed to check for a version that is +2 or more from it's current version.