diff --git a/src/main/kotlin/io/github/thehrz/infernalmobs/handler/EffectHandle.kt b/src/main/kotlin/io/github/thehrz/infernalmobs/handler/EffectHandle.kt
index ab0eb5f..c371b8c 100644
--- a/src/main/kotlin/io/github/thehrz/infernalmobs/handler/EffectHandle.kt
+++ b/src/main/kotlin/io/github/thehrz/infernalmobs/handler/EffectHandle.kt
@@ -17,6 +17,7 @@ import org.koin.core.annotation.Single
 import java.util.*
 import java.util.logging.Level
 
+
 @Single
 class EffectHandle(
     private val configService: ConfigService,
@@ -435,11 +436,10 @@ class EffectHandle(
         for (p in plugin.server.onlinePlayers) {
             gui.fixBar(p)
         }
-        for ((key, value) in infernalMobService.mountList) {
+        for ((key, value) in infernalMobService.mountList.toMutableMap()) {
             if (!key.isDead) {
                 if ((value.isDead) && ((key is LivingEntity))) {
-                    val fate = configService.mainConfig.mountFate
-
+                    val fate: String = configService.mainConfig.mountFate
                     if (fate == "death") {
                         val le = key as LivingEntity?
                         le!!.damage(9.99999999E8)