Preheat the oven to 375 degrees F (190 degrees C). Grease an 8-inch square baking dish.

Place peach slices into the bottom of the baking dish and sprinkle with almond extract.

Combine flour, sugar, brown sugar, cinnamon, and salt in a bowl. Cut the butter into the flour mixture with a pastry cutter until the mixture resembles crumbs; sprinkle over peaches in an even layer.

Bake in the preheated oven until peaches are bubbling and topping is browned, about 45 minutes.