diff --git a/config.go b/config.go
index e2c5a95..af6dde7 100644
--- a/config.go
+++ b/config.go
@@ -80,6 +80,8 @@ func (gmx *Gomuks) LoadConfig() error {
 		_, err = fmt.Scanln(&gmx.Config.Web.Username)
 		if err != nil {
 			return fmt.Errorf("failed to read username: %w", err)
+		} else if len(gmx.Config.Web.Username) == 0 || len(gmx.Config.Web.Username) > 32 {
+			return fmt.Errorf("username must be 1-32 characters long")
 		}
 		fmt.Print("Password: ")
 		var passwd string
diff --git a/server.go b/server.go
index b98d866..a93eb17 100644
--- a/server.go
+++ b/server.go
@@ -83,7 +83,7 @@ type tokenData struct {
 }
 
 func (gmx *Gomuks) validateAuth(token string) bool {
-	if len(token) > 100 {
+	if len(token) > 500 {
 		return false
 	}
 	parts := strings.Split(token, ".")