diff --git a/api/src/main/java/com/alttd/playershops/api/events/PlayerDestroyShopEvent.java b/api/src/main/java/com/alttd/playershops/api/events/PlayerDestroyShopEvent.java
index 87f6266..f5dd992 100644
--- a/api/src/main/java/com/alttd/playershops/api/events/PlayerDestroyShopEvent.java
+++ b/api/src/main/java/com/alttd/playershops/api/events/PlayerDestroyShopEvent.java
@@ -10,8 +10,8 @@ import org.jetbrains.annotations.NotNull;
 public class PlayerDestroyShopEvent extends Event implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
-    private Player player;
-    private Shop shop;
+    private final Player player;
+    private final Shop shop;
     private boolean cancelled;
 
     public PlayerDestroyShopEvent(Player p, Shop s) {
diff --git a/api/src/main/java/com/alttd/playershops/api/events/PlayerExchangeShopEvent.java b/api/src/main/java/com/alttd/playershops/api/events/PlayerExchangeShopEvent.java
index a850857..154f6f1 100644
--- a/api/src/main/java/com/alttd/playershops/api/events/PlayerExchangeShopEvent.java
+++ b/api/src/main/java/com/alttd/playershops/api/events/PlayerExchangeShopEvent.java
@@ -10,8 +10,8 @@ import org.jetbrains.annotations.NotNull;
 public class PlayerExchangeShopEvent extends Event implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
-    private Player player;
-    private Shop shop;
+    private final Player player;
+    private final Shop shop;
     private boolean cancelled;
 
     public PlayerExchangeShopEvent(Player p, Shop s) {
diff --git a/api/src/main/java/com/alttd/playershops/api/events/PlayerInitializeShopEvent.java b/api/src/main/java/com/alttd/playershops/api/events/PlayerInitializeShopEvent.java
index 45e21c5..9755113 100644
--- a/api/src/main/java/com/alttd/playershops/api/events/PlayerInitializeShopEvent.java
+++ b/api/src/main/java/com/alttd/playershops/api/events/PlayerInitializeShopEvent.java
@@ -10,8 +10,8 @@ import org.jetbrains.annotations.NotNull;
 public class PlayerInitializeShopEvent extends Event implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
-    private Player player;
-    private Shop shop;
+    private final Player player;
+    private final Shop shop;
     private boolean cancelled;
 
     public PlayerInitializeShopEvent(Player p, Shop s) {