Abstract: Anti-theft devices are provided for use with both new and previously installed utility boxes. The utility box includes a sidewall, typically set into the ground, and the anti-theft device includes a bracket that hooks beneath the sidewall. The bracket also includes a threaded bore disposed through a fastening piece. The utility box also includes a cover that seals a top opening of the sidewall. The cover includes a hole for receiving a bolt. The threaded bore aligns with the hole in the cover so a bolt can engage the threaded bore to secure the cover to the bracket.