diff --git a/main.go b/main.go
index 5aca092..3c429cb 100644
--- a/main.go
+++ b/main.go
@@ -17,7 +17,7 @@ var (
 	// format string with {0} as placeholders
 	// {0} always matches the whole line
 	// {1} and onwards match their respective sub groups
-	// You can optionall specify a printf-syntax for formatting like this: {1:%s} or {1:%02d}
+	// You can optionally specify a printf-syntax for formatting like this: {1:%s} or {1:%02d}
 	// printf-syntax is currently supported for: strings, floats, integers
 	output = flag.String("o", "{0}", "output pattern")