diff --git a/api-modules/FactionsM/pom.xml b/api-modules/FactionsM/pom.xml
index b723ca5..88dd70b 100644
--- a/api-modules/FactionsM/pom.xml
+++ b/api-modules/FactionsM/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>EpicBosses</artifactId>
         <groupId>com.songoda.epicbosses</groupId>
-        <version>1.2.6</version>
+        <version>1.2.7</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/api-modules/FactionsOne/pom.xml b/api-modules/FactionsOne/pom.xml
index 79b7e5b..0afccc4 100644
--- a/api-modules/FactionsOne/pom.xml
+++ b/api-modules/FactionsOne/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>EpicBosses</artifactId>
         <groupId>com.songoda.epicbosses</groupId>
-        <version>1.2.6</version>
+        <version>1.2.7</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/api-modules/FactionsUUID/pom.xml b/api-modules/FactionsUUID/pom.xml
index 8e0a5f6..8ace7c4 100644
--- a/api-modules/FactionsUUID/pom.xml
+++ b/api-modules/FactionsUUID/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>EpicBosses</artifactId>
         <groupId>com.songoda.epicbosses</groupId>
-        <version>1.2.6</version>
+        <version>1.2.7</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/api-modules/LegacyFactions/pom.xml b/api-modules/LegacyFactions/pom.xml
index 7bd09e6..2a20038 100644
--- a/api-modules/LegacyFactions/pom.xml
+++ b/api-modules/LegacyFactions/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>EpicBosses</artifactId>
         <groupId>com.songoda.epicbosses</groupId>
-        <version>1.2.6</version>
+        <version>1.2.7</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/plugin-modules/Core/pom.xml b/plugin-modules/Core/pom.xml
index 3ff2676..bef21f4 100644
--- a/plugin-modules/Core/pom.xml
+++ b/plugin-modules/Core/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>EpicBosses</artifactId>
         <groupId>com.songoda.epicbosses</groupId>
-        <version>1.2.6</version>
+        <version>1.2.7</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/plugin-modules/Core/src/com/songoda/epicbosses/holder/ActiveBossHolder.java b/plugin-modules/Core/src/com/songoda/epicbosses/holder/ActiveBossHolder.java
index 4ae0a3b..cf4a132 100644
--- a/plugin-modules/Core/src/com/songoda/epicbosses/holder/ActiveBossHolder.java
+++ b/plugin-modules/Core/src/com/songoda/epicbosses/holder/ActiveBossHolder.java
@@ -105,6 +105,7 @@ public class ActiveBossHolder implements IActiveHolder {
 
         // grab list of all valid entities by UUID that can be removed
         Map<Integer, Entity> toRemove = this.livingEntityMap.entrySet().stream()
+                .filter(Objects::nonNull) // This may fix ticket #4522
                 .collect(Collectors.toMap(Map.Entry::getKey, e -> ServerUtils.get().getEntity(e.getValue())))
                 .entrySet().stream()
                 .filter(e -> e.getValue() != null && e.getValue().getWorld().isChunkLoaded(
diff --git a/plugin-modules/Core/src/com/songoda/epicbosses/listeners/after/BossDeathListener.java b/plugin-modules/Core/src/com/songoda/epicbosses/listeners/after/BossDeathListener.java
index 71f608b..5e703f1 100644
--- a/plugin-modules/Core/src/com/songoda/epicbosses/listeners/after/BossDeathListener.java
+++ b/plugin-modules/Core/src/com/songoda/epicbosses/listeners/after/BossDeathListener.java
@@ -45,7 +45,7 @@ public class BossDeathListener implements Listener {
         ActiveBossHolder activeBossHolder = this.bossEntityManager.getActiveBossHolder(livingEntity);
         Location location = livingEntity.getLocation();
 
-        if (activeBossHolder == null) return;
+        if (activeBossHolder == null || entityDamageEvent == null) return;
 
         EntityDamageEvent.DamageCause damageCause = entityDamageEvent.getCause();
         Boolean naturalDrops = activeBossHolder.getBossEntity().getDrops().getNaturalDrops();
diff --git a/plugin-modules/Core/src/com/songoda/epicbosses/mechanics/minions/HealthMechanic.java b/plugin-modules/Core/src/com/songoda/epicbosses/mechanics/minions/HealthMechanic.java
index b7fe4e1..9e25406 100644
--- a/plugin-modules/Core/src/com/songoda/epicbosses/mechanics/minions/HealthMechanic.java
+++ b/plugin-modules/Core/src/com/songoda/epicbosses/mechanics/minions/HealthMechanic.java
@@ -21,7 +21,8 @@ public class HealthMechanic implements IMinionMechanic {
         if (activeMinionHolder.getLivingEntityMap() == null || activeMinionHolder.getLivingEntityMap().isEmpty())
             return false;
 
-        double maxHealthSetting = (double) SpigotYmlReader.get().getObject("settings.attribute.maxHealth.max");
+        double maxHealthSetting = Double.valueOf( SpigotYmlReader
+                .get().getObject("settings.attribute.maxHealth.max").toString());
 
         for (EntityStatsElement entityStatsElement : minionEntity.getEntityStats()) {
             MainStatsElement mainStatsElement = entityStatsElement.getMainStats();
diff --git a/plugin-modules/Core/src/com/songoda/epicbosses/targeting/TargetHandler.java b/plugin-modules/Core/src/com/songoda/epicbosses/targeting/TargetHandler.java
index e25d1b3..2f53834 100644
--- a/plugin-modules/Core/src/com/songoda/epicbosses/targeting/TargetHandler.java
+++ b/plugin-modules/Core/src/com/songoda/epicbosses/targeting/TargetHandler.java
@@ -6,10 +6,7 @@ import com.songoda.epicbosses.managers.BossTargetManager;
 import com.songoda.epicbosses.utils.ServerUtils;
 import org.bukkit.Bukkit;
 import org.bukkit.GameMode;
-import org.bukkit.entity.Creature;
-import org.bukkit.entity.Entity;
-import org.bukkit.entity.LivingEntity;
-import org.bukkit.entity.Player;
+import org.bukkit.entity.*;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -78,7 +75,10 @@ public abstract class TargetHandler<Holder extends IActiveHolder> implements ITa
         getHolder().getLivingEntityMap().values().forEach(uuid -> {
             LivingEntity livingEntity = (LivingEntity) ServerUtils.get().getEntity(uuid);
             if (livingEntity != null && !livingEntity.isDead()) {
-                ((Creature) livingEntity).setTarget(newTarget);
+                if (livingEntity instanceof Mob)
+                    ((Mob) livingEntity).setTarget(newTarget);
+                else
+                    ((Creature) livingEntity).setTarget(newTarget);
             }
         });
     }
diff --git a/plugin-modules/FactionHelper/pom.xml b/plugin-modules/FactionHelper/pom.xml
index b0608c0..7f7a859 100644
--- a/plugin-modules/FactionHelper/pom.xml
+++ b/plugin-modules/FactionHelper/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>EpicBosses</artifactId>
         <groupId>com.songoda.epicbosses</groupId>
-        <version>1.2.6</version>
+        <version>1.2.7</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/pom.xml b/pom.xml
index ab4d1a6..2bd0a7a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <groupId>com.songoda.epicbosses</groupId>
     <artifactId>EpicBosses</artifactId>
     <packaging>pom</packaging>
-    <version>1.2.6</version>
+    <version>1.2.7</version>
 
     <modules>
         <module>api-modules/FactionsM</module>
@@ -16,7 +16,7 @@
     </modules>
 
     <properties>
-        <plugin.version>1.2.6</plugin.version>
+        <plugin.version>1.2.7</plugin.version>
         <plugin.name>EpicBosses</plugin.name>
         <plugin.main>com.songoda.epicbosses.EpicBosses</plugin.main>
         <plugin.author>Songoda</plugin.author>