Preheat oven to 350 °.
In medium bowl, combine crumbs, sugar and 1/2 teaspoon cinnamon. Add melted butter. Press down flat into a 9-inch springform pan. Set aside.
Beat cream cheese until smooth. Add pumpkin puree, eggs, egg yolk, sour cream, sugar and the spices. Add flour and vanilla. Beat together until well combined.
Pour into crust. Spread out evenly and place oven for 1 hour. Remove from the oven and let sit for 15 minutes. Cover with plastic wrap and refrigerate for 4 hours.