diff --git a/maps/planet_prison.lua b/maps/planet_prison.lua
index 3808e285..055d240d 100644
--- a/maps/planet_prison.lua
+++ b/maps/planet_prison.lua
@@ -22,6 +22,9 @@ global.this.maps = {
          moisture = 0,
          temperature = 30.
       },
+      cliff_settings = {
+         richness = 0,
+      },
       starting_area = "none",
       autoplace_controls = {
          ["iron-ore"] = {
@@ -30,6 +33,9 @@ global.this.maps = {
          ["copper-ore"] = {
             frequency = 0,
          },
+         ["uranium-ore"] = {
+            frequency = 0,
+         },
          ["stone"] = {
             frequency = 0,
          },