K9 Finance has increased its bounty to 20 ETH for the hacker responsible for the Shibarium bridge attack, marking a 300% rise from the initial 5 ETH offer. Shiba Inu's lead developer, Kaal Dhairya, has urged the hacker to accept the bounty and return the stolen KNINE tokens. The hacker, who recently broke their silence, is demanding 50 ETH for the full return of the assets. The attack, which occurred on September 12, resulted in the theft of 248 billion KNINE tokens, valued at over $717,000 at the time. In response, Shiba Inu developers have enhanced security measures, including the implementation of multi-signature wallets and a blacklist feature to prevent future breaches.