Due to updated guidance related to the Apache log4j vulnerability we have updated all Signals Notebook Standard, Private Cloud (Staging and Production) and E3 (Staging and Production) environments to Log4j version 2.17 .0. This follows on from a previous upgrade to version 2.16.0 and a disabling of the ability to make the impacted lookups. Please note, we may have already deployed newer versions of Signals Notebook since the writing of this post as part of our normal update schedule. Newer versions will also include the same log4j fixes as 2.17.0. We will continue to monitor for updated guidance and update this Knowledgebase article and our Support News site if any additional changes become necessary.