Guus Hiddink has begun to make plans for next season after signing a new contract with Anzhi Makhachkala last week.
The former Chelsea, Real Madrid and Netherlands manager was the subject of protests from unhappy fans after he could only lead the Russian Premier League side to a third place finish, behind champions CSKA Moscow and Zenit St Petersburg.
Anzhi also reached the Russian cup final but were beaten by CSKA on penalties. However, in an interview with Voetbal International, Hiddink has warned the club must be better equipped if they want to achieve success.
He said: "At the back we can use some strength and we need more productivity up front. Last season our squad was too thin to absorb injuries. Especially around international matches we lost several players for a long time.
"If the club wants to fulfil its ambitions, we should be better armed against that kind of adversity."
Hiddink knows that expectation will be magnified on him after this season's failure and further spending on transfers: "This season the bar will again be a little higher. The club wants to settle permanently at the top," he added.