You can increase your chances of a transaction succeeding by adjusting the following parameters:
Transaction deadline — you may extend the transaction deadline beyond 20 minutes through the Uniswap interface advanced settings. However, please note that this may lead to your trade executing at a subpar exchange rate as the market price may change during that time.
Slippage limit — you may set a new slippage limit. Please beware that increasing your slippage limit may result in an unexpectedly bad exchange rate. Your transaction may be frontrun.
Gas price — setting a higher gas price will increase your chances of your transaction being processed by Ethereum miners more quickly. We recommend using data sites like ethgasstation.info and gasnow.org to estimate a good gas price.