Is my employment contract still valid if it is showing the old minimum wage value on it?

Yes, your employment contract is still valid even if it reflects an old minimum wage value. However, if the minimum wage has increased since your contract was signed, your employer is legally obligated to pay you the updated minimum wage. It's advisable to discuss the discrepancy with your employer to ensure you're receiving the correct compensation. If needed, you may also want to consult a labor rights organization for guidance.