diff --git a/main.go b/main.go
index 836ca4e..bcfad66 100644
--- a/main.go
+++ b/main.go
@@ -70,18 +70,6 @@ var Parser goldmark.Markdown
 var (
 	configFile        string
 	enabledExtensions []string
-
-	// Title site title
-	Title string
-
-	// Description site description
-	Description string
-
-	// Keywords site keywords
-	Keywords string
-
-	// Production is a global variable to conditionally build for production
-	Production = false
 )
 
 // Extensions is a mapping of name to extension and the default set of extensions enabled
@@ -163,7 +151,7 @@ var RootCmd = &cobra.Command{
 		}
 
 		var extensions []goldmark.Extender
-		for _, name := range enabledExtensions {
+		for _, name := range viper.GetStringSlice("extensions") {
 			if extender, valid := Extensions[name]; valid {
 				extensions = append(extensions, extender)
 			} else {
@@ -329,7 +317,7 @@ func globals() Vars {
 		"keywords":    viper.GetString("keywords"),
 	}
 
-	if Production {
+	if viper.GetBool("production") {
 		vars["production"] = "1"
 	}
 
@@ -666,15 +654,18 @@ func init() {
 
 	RootCmd.PersistentFlags().BoolP("debug", "D", false, "enable debug logging $($ZS_DEBUG)")
 	RootCmd.PersistentFlags().StringVarP(&configFile, "config", "c", "", "config file (default: .zs/config.yml)")
-	RootCmd.PersistentFlags().StringSliceVarP(&enabledExtensions, "extensions", "e", MapKeys(Extensions), "override and enable specific extensions")
-	RootCmd.PersistentFlags().BoolVarP(&Production, "production", "p", false, "enable production mode ($ZS_PRODUCTION)")
-	RootCmd.PersistentFlags().StringVarP(&Title, "title", "t", "", "site title ($ZS_TITLE)")
-	RootCmd.PersistentFlags().StringVarP(&Description, "description", "d", "", "site description ($ZS_DESCRIPTION)")
-	RootCmd.PersistentFlags().StringVarP(&Keywords, "keywords", "k", "", "site keywords ($ZS_KEYWORDS)")
+	RootCmd.PersistentFlags().StringSliceP("extensions", "e", MapKeys(Extensions), "override and enable specific extensions")
+	RootCmd.PersistentFlags().BoolP("production", "p", false, "enable production mode ($ZS_PRODUCTION)")
+	RootCmd.PersistentFlags().StringP("title", "t", "", "site title ($ZS_TITLE)")
+	RootCmd.PersistentFlags().StringP("description", "d", "", "site description ($ZS_DESCRIPTION)")
+	RootCmd.PersistentFlags().StringP("keywords", "k", "", "site keywords ($ZS_KEYWORDS)")
 
 	viper.BindPFlag("debug", RootCmd.PersistentFlags().Lookup("debug"))
 	viper.SetDefault("debug", false)
 
+	viper.BindPFlag("extensions", RootCmd.PersistentFlags().Lookup("extensions"))
+	viper.SetDefault("extensions", MapKeys(Extensions))
+
 	viper.BindPFlag("production", RootCmd.PersistentFlags().Lookup("production"))
 	viper.SetDefault("production", false)