Problem with old ciphers

[modzilla99]

^C Error creating SSH client: knownhosts: /var/home/modzilla/.ssh/known_hosts:1464: ssh: unsupported DSA key size 2048
panic: knownhosts: /var/home/modzilla/.ssh/known_hosts:1464: ssh: unsupported DSA key size 2048

goroutine 8 [running]:
main.cleanup()
	/var/home/modzilla/git/ssh-via-netns/cmd/osssh/osssh.go:90 +0x1c5
main.setupCleanup.func1()
	/var/home/modzilla/git/ssh-via-netns/cmd/osssh/osssh.go:135 +0x1e
created by main.setupCleanup in goroutine 1
	/var/home/modzilla/git/ssh-via-netns/cmd/osssh/osssh.go:133 +0xb6