Following last month's horrific Manchester Arena attack, concert venues across the world have been cracking down on security.
Malahide Castle is following suit, with new rules surrounding what you can and cannot bring to gigs.
On the list are backpacks – a festival and concert staple.
'Backpacks and large bags will not be allowed in to the Malahide Castle Concerts, only small bags measuring no bigger than A4 (8.27in/21cm × 11.7/ 29.7cm) will be permitted into the event,' according to a statement released by MCD, so get measuring.
Attendees are advised not to bring a bag at all, as all bags will be searched on entry, and the venue hopes to avoid lengthy queues.
The venue is also introducing stricter searching tactics on entry, involving full body pat downs and the use of hand held metal detectors.
New banned items include Go Pros and selfie sticks.
You will also be refused admission if found to be in possession of anything that can be perceived as a weapon or which could 'cause danger or disruption to any other persons at the event.'
You can find all of the new guidelines here.