diff --git a/cmd/root.go b/cmd/root.go
index 6ba4652..f01f1d3 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -17,7 +17,7 @@ var (
 )
 
 const (
-	Version string = "0.57.4"
+	Version string = "0.57.5"
 )
 
 var (
diff --git a/cmd/web.go b/cmd/web.go
index 05d99ef..37088d7 100644
--- a/cmd/web.go
+++ b/cmd/web.go
@@ -986,7 +986,7 @@ func ServePage(args []string) error {
 
 	Regexes := &Regexes{
 		filename:     regexp.MustCompile(`(.+)([0-9]{3})(\..+)`),
-		alphanumeric: regexp.MustCompile(`^[a-zA-Z0-9]*$`),
+		alphanumeric: regexp.MustCompile(`^[A-z0-9]*$`),
 	}
 
 	srv := &http.Server{