diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/commands/CommandGiveRandomBook.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/commands/CommandGiveRandomBook.kt
index d2edcc21..5f09be9f 100644
--- a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/commands/CommandGiveRandomBook.kt
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/commands/CommandGiveRandomBook.kt
@@ -84,7 +84,11 @@ class CommandGiveRandomBook(plugin: EcoPlugin) : PluginCommand(
             1 -> Bukkit.getOnlinePlayers().map { it.name }
             2 -> (EnchantmentRarities.values().map { it.id } + EnchantmentTypes.values().map { it.id })
             3 -> (1..10).map { it.toString() }
-            4 -> ((args[3].toIntOrNull() ?: 1)..(args[3].toIntOrNull() ?: 1) + 10).map { it.toString() }
+            4 -> {
+                val startLevel = args[3].toIntOrNull() ?: 1
+                val endLevel = startLevel + 10
+                (startLevel..endLevel).map { it.toString() }
+            }
             else -> emptyList()
         }
     }
diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/config/Configs.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/config/Configs.kt
index c12dd272..afbbf118 100644
--- a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/config/Configs.kt
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/config/Configs.kt
@@ -3,8 +3,13 @@ package com.willfp.ecoenchants.config
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.config.BaseConfig
 import com.willfp.eco.core.config.ConfigType
+import com.willfp.eco.core.config.ExtendableConfig
+import com.willfp.ecoenchants.enchants.EcoEnchant
+import org.bukkit.enchantments.Enchantment
 
 class TypesYml(plugin: EcoPlugin) : BaseConfig("types", plugin, true, ConfigType.YAML)
 class TargetsYml(plugin: EcoPlugin) : BaseConfig("targets", plugin, true, ConfigType.YAML)
 class RarityYml(plugin: EcoPlugin) : BaseConfig("rarity", plugin, true, ConfigType.YAML)
-class VanillaEnchantsYml(plugin: EcoPlugin) : BaseConfig("vanillaenchants", plugin, true, ConfigType.YAML)
+class VanillaEnchantsYml(plugin: EcoPlugin) : ExtendableConfig("vanillaenchants", true, plugin,
+    plugin.javaClass, "", ConfigType.YAML, *Enchantment.values().filter { it !is EcoEnchant }
+        .map { it.key.key.lowercase() }.toTypedArray())