diff --git a/README.md b/README.md
index 1e811677..4cc40a0c 100644
--- a/README.md
+++ b/README.md
@@ -184,6 +184,10 @@ pager: true
 width: 80
 # show all files, including hidden and ignored.
 all: true
+# show line numbers (TUI-mode only)
+showLineNumbers: false
+# preserve newlines in the output
+preserveNewLines: false
 ```
 
 ## Feedback
diff --git a/main.go b/main.go
index fb3ce57e..e331dbf5 100644
--- a/main.go
+++ b/main.go
@@ -148,6 +148,7 @@ func validateOptions(cmd *cobra.Command) error {
 	pager = viper.GetBool("pager")
 	showAllFiles = viper.GetBool("all")
 	preserveNewLines = viper.GetBool("preserveNewLines")
+	showLineNumbers = viper.GetBool("showLineNumbers")
 
 	// validate the glamour style
 	style = viper.GetString("style")