Oscar Pistorius has had his jail term for the murder of girlfriend Reeva Steenkamp upgraded to 13 years, more than double of the initial 6 years.

The Supreme Court of Appeal had felt the initial sentence was too lenient, increasing it to 13 years and five months.

Pistorius, an iconic Olympic runner, had shot Steenkamp to death in his home on Valentine’s Day, 2013. He had claimed that he thought it was an intruder.

The court’s decision is “justice for Reeva,” her family’s spokeswoman said, adding that they hope “this is the end of the road and that everyone can move forward.”

ALSO: Oscar De La Hoya wants Mayweather – McGregor fight cancelled

Prosecutor Gerrie Nel argued that Pistorius’ sentence was “shockingly lenient,” while the defense sought to dismiss the appeal.

Supreme Court Justice Willie Seriti said Pistorius failed to explain in court hearings why he fired the fatal shots and “does not appreciate the gravity of his actions.”

“I find it difficult on the evidence to accept that the respondent is genuinely remorseful,” Seriti wrote in his decision.

Seriti said the facts of the case demanded a higher sentence. “The sentence of six years’ imprisonment is shockingly lenient to a point where it has the effect of trivializing this serious offense,” he added.

Pistorius can appeal the new sentence, according to Kelly Phelps, an adviser to his defense team, but no decision has been made.