diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/enchants/EcoEnchant.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/enchants/EcoEnchant.kt
index 05acdbe2..0937a994 100644
--- a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/enchants/EcoEnchant.kt
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/enchants/EcoEnchant.kt
@@ -171,7 +171,7 @@ abstract class EcoEnchant(
     }
 
     private fun checkDependencies() {
-        val missingPlugins = mutableListOf<String>()
+        val missingPlugins = mutableSetOf<String>()
 
         for (dependency in config.getStrings("dependencies")) {
             if (!Bukkit.getPluginManager().plugins.map { it.name }.containsIgnoreCase(dependency)) {
diff --git a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/enchants/MissingDependencyException.kt b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/enchants/MissingDependencyException.kt
index f2d60c41..6da9b010 100644
--- a/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/enchants/MissingDependencyException.kt
+++ b/eco-core/core-plugin/src/main/kotlin/com/willfp/ecoenchants/enchants/MissingDependencyException.kt
@@ -4,7 +4,7 @@ import com.willfp.eco.core.EcoPlugin
 import com.willfp.ecoenchants.EcoEnchantsPlugin
 
 class MissingDependencyException(
-    val plugins: List<String>
+    val plugins: Set<String>
 ) : Exception() {
     override val message = "Missing the following plugins: ${plugins.joinToString(", ")}"
 }
@@ -12,7 +12,7 @@ class MissingDependencyException(
 // Plugin names mapped to enchants that aren't installed.
 private val prompts = mutableMapOf<String, Int>()
 
-fun addPluginPrompt(plugin: EcoEnchantsPlugin, plugins: List<String>) {
+fun addPluginPrompt(plugin: EcoEnchantsPlugin, plugins: Set<String>) {
     if (!plugin.isLoaded) {
         return
     }