Parse error: syntax error

[jvenes]

after a succesfull update i got this message:
Got an error : Parse error: syntax error, unexpected '[' in /home/....../includes/libs/php-barcode-generator-master/src/BarcodeGenerator.php on line 228

[jvenes]

i've got the explanation
this is error is due an older php version
got to move the site to a newer version