Hi Totto, mid 5's are still pretty good so I wouldn't worry too much, just keep monitoring. I guess you've tested current batch of test strips with control solution ? If this small increase resumes when you start another batch, you will at least know for sure and can make a decision whether to accept slightly higher results or try to adjust lifestyle again to bring back down. I know you already do LCHF so maybe another option would be an early morning walk or similar ?