The agile manifesto has served us well now for 13 years and is still as valid as ever. The only problem now is that the agile mindset is expanding beyond software development, and when presenting the manifesto I often get asked about "Working Software over comprehensive documentation". This does seem to limit agile to the area of software development, which is not true as it can be used in many areas.
So why don't we be agile about the manifesto itself and embrace change? Perhaps it's time to tweak the wording slightly - what about
"Delivering value over comprehensive documentation?"
This small change would move the perception of agile into a whole new world, and actually describes more what we are trying to achieve.