The former Arsenal defender's previous deal at the Stade Armand Cesari was due to expire at the end of the season.
However, the 34-year-old has now signed on for another 12 months, with the option of a further year.
Squillaci joined Bastia back in 2013 on a free transfer following a three-year stint with the Gunners, for whom he made 40 appearances in all competitions.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Auxerre | 32 | 17 | 10 | 5 | 59 | 32 | 27 | 61 |
| 2 | Angers | 32 | 16 | 7 | 9 | 47 | 35 | 12 | 55 |
| 3 | Saint-EtienneSt Etienne | 32 | 16 | 6 | 10 | 39 | 25 | 14 | 54 |
| 4 | Paris FCParis FC | 32 | 13 | 10 | 9 | 41 | 35 | 6 | 49 |
| 5 | Laval | 32 | 13 | 10 | 9 | 37 | 35 | 2 | 49 |
| 6 | Caen | 32 | 14 | 6 | 12 | 42 | 39 | 3 | 48 |
| 7 | Rodez AFRodez AF | 32 | 12 | 11 | 9 | 53 | 46 | 7 | 47 |
| 8 | GuingampGuingamp | 32 | 12 | 11 | 9 | 38 | 31 | 7 | 47 |
| 9 | PauPau | 32 | 12 | 11 | 9 | 50 | 46 | 4 | 47 |
| 10 | AmiensAmiens | 32 | 10 | 14 | 8 | 28 | 30 | -2 | 44 |
| 11 | Grenoble | 32 | 10 | 12 | 10 | 37 | 35 | 2 | 42 |
| 12 | Ajaccio | 32 | 11 | 9 | 12 | 31 | 35 | -4 | 42 |
| 13 | Bordeaux | 32 | 11 | 9 | 12 | 38 | 43 | -5 | 41 |
| 14 | Bastia | 32 | 11 | 8 | 13 | 35 | 41 | -6 | 40 |
| 15 | Annecy | 32 | 10 | 9 | 13 | 40 | 41 | -1 | 39 |
| 16 | DunkerqueDunkerque | 32 | 10 | 8 | 14 | 30 | 44 | -14 | 38 |
| 17 | Troyes | 32 | 8 | 11 | 13 | 36 | 43 | -7 | 35 |
| 18 | Concarneau | 32 | 9 | 7 | 16 | 32 | 45 | -13 | 34 |
| 19 | Quevilly | 32 | 6 | 14 | 12 | 43 | 46 | -3 | 32 |
| 20 | Valenciennes | 32 | 2 | 11 | 19 | 19 | 48 | -29 | 17 |
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