2013 Mazda2 Venture High revs between gears

[ODMF]

Hi guys, just recently bought my 2nd Mazda2. It's a 2013 Venture with 40k miles and one previous owner, it's in really good shape.

My only issue is that between each gear change between 2nd and 5th, the revs jump up to 1.5k higher than they need to be and then drop back down to where they should be. Any ideas what could be causing it? Could it be the clutch?

Thanks in advance.