AlliedModders - hlstats.pl bug

Code:
Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/^weapon { <-- HERE  steam_id: 'STEAM_\d+:(.+?)', weapon_id: (\d+), class: \d+, team: \d+, shots: \((\d+),(\d+)\), hits: \((\d+),(\d+)\), damage: \((\d+),(\d+)\), headshots: \((\d+),(\d+)\), kills: \(\d+,\d+\) }$/ at ./hlstats.pl line 3330.

Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/^(?:join|change)_class { <-- HERE  steam_id: 'STEAM_\d+:(.+?)', .* (?:new_|)class: (\d+), .* }$/ at ./hlstats.pl line 3364.

Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/^objective { <-- HERE  steam_id: 'STEAM_\d+:(.+?)', class: \d+, team: \d+, objective: '(.+?)', time: \d+ }$/ at ./hlstats.pl line 3383.
Anyone know how to fix this ? thanks :)