In today’s era drones and UAV are being used more and more for spying and warfare. Their excessive use makes them vulnerable to be hacked and used for malicious purposes. There are also security loopholes in this technology like the radio waves which can be exploited by the rivals and can cause a large amount of destruction or loss of data. This paper is written to improve the security of UAV and drones by using blockchain technology. Blockchain is a highly secured technology as it uses private key cryptography and peer to peer network. By incorporating this technology in transmitting signals from controller to drone or UAV, we can achieve an extra amount of security in transmitting of signals also it increases the connectivity.