SPD un-clipping as I pull up

I've been riding SPDs for a year, pedals are SPD 520s.
My right foot keeps coming unclipped when I pull up, doesn't happen as I pull up with the left.
Both cleats show about the same wear.
So do I need new cleats or just an adjustment?
If they need adjusting how do I do it?
My right foot keeps coming unclipped when I pull up, doesn't happen as I pull up with the left.
Both cleats show about the same wear.
So do I need new cleats or just an adjustment?
If they need adjusting how do I do it?
I used to just ride my bike to work but now I find myself going out looking for bigger and bigger hills.
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Just an Allen key.
Parktools :?:SheldonBrown
- Cannondale CAADX Force/105/Rival
Parktools :?:SheldonBrown