diff --git a/cmd/root.go b/cmd/root.go
index 4deb86d..013e04f 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -15,7 +15,7 @@ import (
 
 const (
 	AllowedCharacters string = `^[A-z0-9.\-_]+$`
-	ReleaseVersion    string = "4.0.0"
+	ReleaseVersion    string = "4.0.1"
 )
 
 var (
@@ -139,7 +139,7 @@ func init() {
 	rootCmd.Flags().StringVar(&CodeTheme, "code-theme", "solarized-dark256", "theme for source code syntax highlighting")
 	rootCmd.Flags().StringVar(&Compression, "compression", "zstd", "compression format to use for index (flate, gzip, lz5, lzw, none, snappy, zlib, zstd)")
 	rootCmd.Flags().BoolVar(&CompressionFast, "compression-fast", false, "use fastest compression level (default is best)")
-	rootCmd.Flags().IntVar(&Concurrency, "concurrency", int(^uint(0)>>1), "maximum concurrency for scan threads")
+	rootCmd.Flags().IntVar(&Concurrency, "concurrency", math.MaxInt32, "maximum concurrency for scan threads")
 	rootCmd.Flags().BoolVarP(&Debug, "debug", "d", false, "display even more verbose logs")
 	rootCmd.Flags().BoolVar(&DisableButtons, "disable-buttons", false, "disable first/prev/next/last buttons")
 	rootCmd.Flags().BoolVar(&ExitOnError, "exit-on-error", false, "shut down webserver on error, instead of just printing error")