diff --git a/src/main/java/com/atsuishio/superbwarfare/client/tooltip/ClientBocekImageTooltip.java b/src/main/java/com/atsuishio/superbwarfare/client/tooltip/ClientBocekImageTooltip.java
index da5dc6ad7..2f4a585a2 100644
--- a/src/main/java/com/atsuishio/superbwarfare/client/tooltip/ClientBocekImageTooltip.java
+++ b/src/main/java/com/atsuishio/superbwarfare/client/tooltip/ClientBocekImageTooltip.java
@@ -34,9 +34,9 @@ public class ClientBocekImageTooltip extends ClientGunImageTooltip {
             for (var type : Perk.Type.values()) {
                 var instance = data.perk.getInstance(type);
                 if (instance != null) {
-                    shotDamage = instance.perk().getDisplayDamage(shotDamage, getGunData(), instance);
-                    if (instance.perk().getExtraDisplayDamage(shotDamage, getGunData(), instance) >= 0) {
-                        extraDamage = instance.perk().getExtraDisplayDamage(shotDamage, getGunData(), instance);
+                    shotDamage = instance.perk().getDisplayDamage(shotDamage, data, instance);
+                    if (instance.perk().getExtraDisplayDamage(shotDamage, data, instance) >= 0) {
+                        extraDamage = instance.perk().getExtraDisplayDamage(shotDamage, data, instance);
                     }
                 }
             }
diff --git a/src/main/java/com/atsuishio/superbwarfare/item/gun/data/subdata/Perks.java b/src/main/java/com/atsuishio/superbwarfare/item/gun/data/subdata/Perks.java
index 4dc295f72..a37c5f3f1 100644
--- a/src/main/java/com/atsuishio/superbwarfare/item/gun/data/subdata/Perks.java
+++ b/src/main/java/com/atsuishio/superbwarfare/item/gun/data/subdata/Perks.java
@@ -58,7 +58,7 @@ public final class Perks {
         return getLevel(item.getPerk());
     }
 
-    public short getLevel(DeferredHolder<Perk, Perk> perk) {
+    public short getLevel(DeferredHolder<Perk, ? extends Perk> perk) {
         return getLevel(perk.get());
     }