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there are a few situations where you might need to upgrade your smart contract it can be to fix a security renewability change the business logic or add new features but once you deploy a smart contract its code is immutable you cannot change it fortunately there are a few tricks to make your smart contract upgradeable everything i will show you in this video works on any evm compatible blockchain which means ethereum of course but also binance matching and polygon if you dont know me im julian and on ether blocks i teach blockchain development [Music] the first method to upgrade your smart contract is by using a proxy when a user interacts with your smart contract it first goes through a proxy spot contract that forward the function call to the actual implementation represented on this graph by v1 v2 v3 when the user is going to call a function on the proxy this function doesnt actually exist on the proxy but thanks to the fallback feature of solidity we are still able to process