diff --git a/main/src/main/java/net/citizensnpcs/npc/ai/BoundingBoxExaminer.java b/main/src/main/java/net/citizensnpcs/npc/ai/BoundingBoxExaminer.java
index db22ff166..6e5de3f25 100644
--- a/main/src/main/java/net/citizensnpcs/npc/ai/BoundingBoxExaminer.java
+++ b/main/src/main/java/net/citizensnpcs/npc/ai/BoundingBoxExaminer.java
@@ -9,6 +9,7 @@ import net.citizensnpcs.api.astar.pathfinder.BlockSource;
 import net.citizensnpcs.api.astar.pathfinder.MinecraftBlockExaminer;
 import net.citizensnpcs.api.astar.pathfinder.PathPoint;
 import net.citizensnpcs.api.util.BoundingBox;
+import net.citizensnpcs.util.NMS;
 
 public class BoundingBoxExaminer implements BlockExaminer {
     private double height;
@@ -16,8 +17,8 @@ public class BoundingBoxExaminer implements BlockExaminer {
 
     public BoundingBoxExaminer(Entity entity) {
         if (entity != null) {
-            this.height = entity.getHeight();
-            this.width = entity.getWidth();
+            this.height = NMS.getHeight(entity);
+            this.width = NMS.getWidth(entity);
         }
     }
 
diff --git a/main/src/main/java/net/citizensnpcs/trait/HologramTrait.java b/main/src/main/java/net/citizensnpcs/trait/HologramTrait.java
index ef4fbf74c..cd43f2a90 100644
--- a/main/src/main/java/net/citizensnpcs/trait/HologramTrait.java
+++ b/main/src/main/java/net/citizensnpcs/trait/HologramTrait.java
@@ -18,6 +18,7 @@ import net.citizensnpcs.api.persistence.Persist;
 import net.citizensnpcs.api.trait.Trait;
 import net.citizensnpcs.api.trait.TraitName;
 import net.citizensnpcs.api.util.Placeholders;
+import net.citizensnpcs.util.NMS;
 
 /**
  * Persists a hologram attached to the NPC.
@@ -42,6 +43,17 @@ public class HologramTrait extends Trait {
         load();
     }
 
+    private double getEntityHeight() {
+        if (SUPPORT_GET_HEIGHT) {
+            try {
+                return npc.getEntity().getHeight();
+            } catch (NoSuchMethodError err) {
+                SUPPORT_GET_HEIGHT = false;
+            }
+        }
+        return NMS.getHeight(npc.getEntity());
+    }
+
     private double getHeight(int lineNumber) {
         return (lineHeight == -1 ? Setting.DEFAULT_NPC_HOLOGRAM_LINE_HEIGHT.asDouble() : lineHeight) * (lineNumber + 1);
     }
@@ -62,7 +74,7 @@ public class HologramTrait extends Trait {
             trait.setGravity(false);
             trait.setHasArms(false);
             trait.setHasBaseplate(false);
-            hologramNPC.spawn(currentLoc.clone().add(0, npc.getEntity().getHeight() + getHeight(i), 0));
+            hologramNPC.spawn(currentLoc.clone().add(0, getEntityHeight() + getHeight(i), 0));
             hologramNPC.getEntity().setInvulnerable(true);
             hologramNPCs.add(hologramNPC);
             i++;
@@ -106,7 +118,7 @@ public class HologramTrait extends Trait {
             if (hologram == null)
                 continue;
             if (update) {
-                hologramNPC.teleport(currentLoc.clone().add(0, npc.getEntity().getHeight() + getHeight(i), 0),
+                hologramNPC.teleport(currentLoc.clone().add(0, getEntityHeight() + getHeight(i), 0),
                         TeleportCause.PLUGIN);
             }
             String text = lines.get(i);
@@ -133,4 +145,6 @@ public class HologramTrait extends Trait {
         }
         hologramNPCs.clear();
     }
+
+    private static boolean SUPPORT_GET_HEIGHT = true;
 }
diff --git a/main/src/main/java/net/citizensnpcs/util/NMS.java b/main/src/main/java/net/citizensnpcs/util/NMS.java
index 0a5d06b62..296c1112f 100644
--- a/main/src/main/java/net/citizensnpcs/util/NMS.java
+++ b/main/src/main/java/net/citizensnpcs/util/NMS.java
@@ -187,6 +187,10 @@ public class NMS {
         return BRIDGE.getHeadYaw(entity);
     }
 
+    public static double getHeight(Entity entity) {
+        return BRIDGE.getHeight(entity);
+    }
+
     public static float getHorizontalMovement(org.bukkit.entity.Entity bukkitEntity) {
         return BRIDGE.getHorizontalMovement(bukkitEntity);
     }
@@ -279,6 +283,10 @@ public class NMS {
         return BRIDGE.getVerticalMovement(bukkitEntity);
     }
 
+    public static double getWidth(Entity entity) {
+        return BRIDGE.getWidth(entity);
+    }
+
     public static float getYaw(Entity entity) {
         return BRIDGE.getYaw(entity);
     }
diff --git a/main/src/main/java/net/citizensnpcs/util/NMSBridge.java b/main/src/main/java/net/citizensnpcs/util/NMSBridge.java
index ea229cb89..f39c65d7c 100644
--- a/main/src/main/java/net/citizensnpcs/util/NMSBridge.java
+++ b/main/src/main/java/net/citizensnpcs/util/NMSBridge.java
@@ -55,6 +55,8 @@ public interface NMSBridge {
 
     public float getHeadYaw(Entity entity);
 
+    public double getHeight(Entity entity);
+
     public float getHorizontalMovement(Entity entity);
 
     public NPC getNPC(Entity entity);
@@ -79,6 +81,8 @@ public interface NMSBridge {
 
     public float getVerticalMovement(Entity entity);
 
+    public double getWidth(Entity entity);
+
     public float getYaw(Entity entity);
 
     public boolean isOnGround(Entity entity);
diff --git a/v1_10_R1/src/main/java/net/citizensnpcs/nms/v1_10_R1/util/NMSImpl.java b/v1_10_R1/src/main/java/net/citizensnpcs/nms/v1_10_R1/util/NMSImpl.java
index aef74c2c8..5d127e14a 100644
--- a/v1_10_R1/src/main/java/net/citizensnpcs/nms/v1_10_R1/util/NMSImpl.java
+++ b/v1_10_R1/src/main/java/net/citizensnpcs/nms/v1_10_R1/util/NMSImpl.java
@@ -369,6 +369,11 @@ public class NMSImpl implements NMSBridge {
         return getHandle((LivingEntity) entity).aQ;
     }
 
+    @Override
+    public double getHeight(org.bukkit.entity.Entity entity) {
+        return getHandle(entity).length;
+    }
+
     @Override
     public float getHorizontalMovement(org.bukkit.entity.Entity entity) {
         if (!entity.getType().isAlive())
@@ -564,6 +569,11 @@ public class NMSImpl implements NMSBridge {
         return handle.bf;
     }
 
+    @Override
+    public double getWidth(org.bukkit.entity.Entity entity) {
+        return getHandle(entity).width;
+    }
+
     @Override
     public float getYaw(org.bukkit.entity.Entity entity) {
         return getHandle(entity).yaw;
diff --git a/v1_11_R1/src/main/java/net/citizensnpcs/nms/v1_11_R1/util/NMSImpl.java b/v1_11_R1/src/main/java/net/citizensnpcs/nms/v1_11_R1/util/NMSImpl.java
index 8cdf715c1..fafd2674d 100644
--- a/v1_11_R1/src/main/java/net/citizensnpcs/nms/v1_11_R1/util/NMSImpl.java
+++ b/v1_11_R1/src/main/java/net/citizensnpcs/nms/v1_11_R1/util/NMSImpl.java
@@ -388,6 +388,11 @@ public class NMSImpl implements NMSBridge {
         return getHandle((LivingEntity) entity).aP;
     }
 
+    @Override
+    public double getHeight(org.bukkit.entity.Entity entity) {
+        return getHandle(entity).length;
+    }
+
     @Override
     public float getHorizontalMovement(org.bukkit.entity.Entity entity) {
         if (!entity.getType().isAlive())
@@ -602,6 +607,11 @@ public class NMSImpl implements NMSBridge {
         return handle.be;
     }
 
+    @Override
+    public double getWidth(org.bukkit.entity.Entity entity) {
+        return getHandle(entity).width;
+    }
+
     @Override
     public float getYaw(org.bukkit.entity.Entity entity) {
         return getHandle(entity).yaw;
diff --git a/v1_12_R1/src/main/java/net/citizensnpcs/nms/v1_12_R1/util/NMSImpl.java b/v1_12_R1/src/main/java/net/citizensnpcs/nms/v1_12_R1/util/NMSImpl.java
index 49bb92b6f..8c243e991 100644
--- a/v1_12_R1/src/main/java/net/citizensnpcs/nms/v1_12_R1/util/NMSImpl.java
+++ b/v1_12_R1/src/main/java/net/citizensnpcs/nms/v1_12_R1/util/NMSImpl.java
@@ -392,6 +392,11 @@ public class NMSImpl implements NMSBridge {
         return getHandle((LivingEntity) entity).aP;
     }
 
+    @Override
+    public double getHeight(org.bukkit.entity.Entity entity) {
+        return entity.getHeight();
+    }
+
     @Override
     public float getHorizontalMovement(org.bukkit.entity.Entity entity) {
         if (!entity.getType().isAlive())
@@ -606,6 +611,11 @@ public class NMSImpl implements NMSBridge {
         return handle.be;
     }
 
+    @Override
+    public double getWidth(org.bukkit.entity.Entity entity) {
+        return entity.getWidth();
+    }
+
     @Override
     public float getYaw(org.bukkit.entity.Entity entity) {
         return getHandle(entity).yaw;
diff --git a/v1_13_R2/src/main/java/net/citizensnpcs/nms/v1_13_R2/util/NMSImpl.java b/v1_13_R2/src/main/java/net/citizensnpcs/nms/v1_13_R2/util/NMSImpl.java
index 143f400a7..b74018a63 100644
--- a/v1_13_R2/src/main/java/net/citizensnpcs/nms/v1_13_R2/util/NMSImpl.java
+++ b/v1_13_R2/src/main/java/net/citizensnpcs/nms/v1_13_R2/util/NMSImpl.java
@@ -415,6 +415,11 @@ public class NMSImpl implements NMSBridge {
         return getHandle((LivingEntity) entity).aS;
     }
 
+    @Override
+    public double getHeight(org.bukkit.entity.Entity entity) {
+        return entity.getHeight();
+    }
+
     @Override
     public float getHorizontalMovement(org.bukkit.entity.Entity entity) {
         if (!entity.getType().isAlive())
@@ -629,6 +634,11 @@ public class NMSImpl implements NMSBridge {
         return handle.bh;
     }
 
+    @Override
+    public double getWidth(org.bukkit.entity.Entity entity) {
+        return entity.getWidth();
+    }
+
     @Override
     public float getYaw(org.bukkit.entity.Entity entity) {
         return getHandle(entity).yaw;
diff --git a/v1_14_R1/src/main/java/net/citizensnpcs/nms/v1_14_R1/util/NMSImpl.java b/v1_14_R1/src/main/java/net/citizensnpcs/nms/v1_14_R1/util/NMSImpl.java
index 13eeba251..bdb36b459 100644
--- a/v1_14_R1/src/main/java/net/citizensnpcs/nms/v1_14_R1/util/NMSImpl.java
+++ b/v1_14_R1/src/main/java/net/citizensnpcs/nms/v1_14_R1/util/NMSImpl.java
@@ -451,6 +451,11 @@ public class NMSImpl implements NMSBridge {
         return getHandle((LivingEntity) entity).aM;
     }
 
+    @Override
+    public double getHeight(org.bukkit.entity.Entity entity) {
+        return entity.getHeight();
+    }
+
     @Override
     public float getHorizontalMovement(org.bukkit.entity.Entity entity) {
         if (!entity.getType().isAlive())
@@ -678,6 +683,11 @@ public class NMSImpl implements NMSBridge {
         return handle.bb;
     }
 
+    @Override
+    public double getWidth(org.bukkit.entity.Entity entity) {
+        return entity.getWidth();
+    }
+
     @Override
     public float getYaw(org.bukkit.entity.Entity entity) {
         return getHandle(entity).yaw;
diff --git a/v1_15_R1/src/main/java/net/citizensnpcs/nms/v1_15_R1/util/NMSImpl.java b/v1_15_R1/src/main/java/net/citizensnpcs/nms/v1_15_R1/util/NMSImpl.java
index 1bf3bc8b1..d2bc56686 100644
--- a/v1_15_R1/src/main/java/net/citizensnpcs/nms/v1_15_R1/util/NMSImpl.java
+++ b/v1_15_R1/src/main/java/net/citizensnpcs/nms/v1_15_R1/util/NMSImpl.java
@@ -458,6 +458,11 @@ public class NMSImpl implements NMSBridge {
         return getHandle((LivingEntity) entity).aK;
     }
 
+    @Override
+    public double getHeight(org.bukkit.entity.Entity entity) {
+        return entity.getHeight();
+    }
+
     @Override
     public float getHorizontalMovement(org.bukkit.entity.Entity entity) {
         if (!entity.getType().isAlive())
@@ -686,6 +691,11 @@ public class NMSImpl implements NMSBridge {
         return handle.aZ;
     }
 
+    @Override
+    public double getWidth(org.bukkit.entity.Entity entity) {
+        return entity.getWidth();
+    }
+
     @Override
     public float getYaw(org.bukkit.entity.Entity entity) {
         return getHandle(entity).yaw;
diff --git a/v1_16_R1/src/main/java/net/citizensnpcs/nms/v1_16_R1/util/NMSImpl.java b/v1_16_R1/src/main/java/net/citizensnpcs/nms/v1_16_R1/util/NMSImpl.java
index 03de9bfa7..3e036f144 100644
--- a/v1_16_R1/src/main/java/net/citizensnpcs/nms/v1_16_R1/util/NMSImpl.java
+++ b/v1_16_R1/src/main/java/net/citizensnpcs/nms/v1_16_R1/util/NMSImpl.java
@@ -464,6 +464,11 @@ public class NMSImpl implements NMSBridge {
         return getHandle((LivingEntity) entity).getHeadRotation();
     }
 
+    @Override
+    public double getHeight(org.bukkit.entity.Entity entity) {
+        return entity.getHeight();
+    }
+
     @Override
     public float getHorizontalMovement(org.bukkit.entity.Entity entity) {
         if (!entity.getType().isAlive())
@@ -692,6 +697,11 @@ public class NMSImpl implements NMSBridge {
         return handle.aY;
     }
 
+    @Override
+    public double getWidth(org.bukkit.entity.Entity entity) {
+        return entity.getWidth();
+    }
+
     @Override
     public float getYaw(org.bukkit.entity.Entity entity) {
         return getHandle(entity).yaw;
diff --git a/v1_8_R3/src/main/java/net/citizensnpcs/nms/v1_8_R3/util/NMSImpl.java b/v1_8_R3/src/main/java/net/citizensnpcs/nms/v1_8_R3/util/NMSImpl.java
index 3b29c4a60..ebdc8eb37 100644
--- a/v1_8_R3/src/main/java/net/citizensnpcs/nms/v1_8_R3/util/NMSImpl.java
+++ b/v1_8_R3/src/main/java/net/citizensnpcs/nms/v1_8_R3/util/NMSImpl.java
@@ -320,6 +320,11 @@ public class NMSImpl implements NMSBridge {
         return getHandle((LivingEntity) entity).aK;
     }
 
+    @Override
+    public double getHeight(org.bukkit.entity.Entity entity) {
+        return getHandle(entity).length;
+    }
+
     @Override
     public float getHorizontalMovement(org.bukkit.entity.Entity entity) {
         if (!entity.getType().isAlive())
@@ -501,6 +506,11 @@ public class NMSImpl implements NMSBridge {
         return handle.aZ;
     }
 
+    @Override
+    public double getWidth(org.bukkit.entity.Entity entity) {
+        return getHandle(entity).width;
+    }
+
     @Override
     public float getYaw(org.bukkit.entity.Entity entity) {
         return getHandle(entity).yaw;