Type error when running stonks

[ghost]

$ stonks AMD
panic: interface conversion: interface {} is int, not graph.ChartTheme

goroutine 1 [running]:
main.main.func1(0xc0000eeb00, 0xc0000ad530, 0x1, 0x1)
/home/jc/Documents/finance/stonks/main.go:106 +0x1606
github.com/spf13/cobra.(*Command).execute(0xc0000eeb00, 0xc0000ba030, 0x1, 0x1, 0xc0000eeb00, 0xc0000ba030)
/home/jc/go/pkg/mod/github.com/spf13/cobra@v1.0.0/command.go:846 +0x29d
github.com/spf13/cobra.(*Command).ExecuteC(0xc0000eeb00, 0xc0000c4bc8, 0x910edb, 0x7)
/home/jc/go/pkg/mod/github.com/spf13/cobra@v1.0.0/command.go:950 +0x349
github.com/spf13/cobra.(*Command).Execute(...)
/home/jc/go/pkg/mod/github.com/spf13/cobra@v1.0.0/command.go:887
main.main()
/home/jc/Documents/finance/stonks/main.go:192 +0x605

OS: linux mint 19.2
Stonks was installed using go version go1.14.3 linux/amd64

Steps to reproduce:
$ stonks -s AMD
$ stonks

[ericm]

Thanks. I'll fix that asap.

[FileGo]

This should do for main.go:106.

chartTheme := graph.ChartTheme(viper.GetInt("config.default_theme"))