diff --git a/cmd/root.go b/cmd/root.go
index d805d519f..72e59abeb 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -91,7 +91,7 @@ func setAllConfig(v *viper.Viper, flags *pflag.FlagSet, envPrefix string) error
 
 	// add env to viper
 	v.SetEnvPrefix(envPrefix)
-	v.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
+	v.SetEnvKeyReplacer(strings.NewReplacer("-", "_", ".", "_"))
 	v.AutomaticEnv()
 
 	c := v.GetString("config")