When blind baking a pastry shell, whether for further baking with or without filling, it is best to weigh down the parchment with something to further prevent rising of the crust.
You can use any number of things, from old dried beans to special pie weights, but the thing I like to use best is change. Any old loose change like pennies will work. They conduct the heat of the oven which will enable to base to cook through and also weigh down the shell to prevent it rising up. The only problem with this method is that the sides can still brown as you only need one layer of coins, if this is an issue, you can cover the sides with a layer of tin foil.
Since change can be dirty [as can old baking beans or pie weights], it is best to use a circle of parchment paper to cover the pastry.
