Lambert this week followed Gabby Agbonlahor and Alan Hutton by agreeing a new long-term deal, signing on until 2018.
"That is the next thing on the agenda," said Lambert, whose second-placed side host Arsenal on Saturday. "The two lads (Agbonlahor and Hutton) have signed which is great. If we can get the other lads tied up that is what we will try to do."
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