diff --git a/bukkit/src/main/java/me/lucko/luckperms/bukkit/vault/VaultHookManager.java b/bukkit/src/main/java/me/lucko/luckperms/bukkit/vault/VaultHookManager.java
index d5ca3ded..53bf4932 100644
--- a/bukkit/src/main/java/me/lucko/luckperms/bukkit/vault/VaultHookManager.java
+++ b/bukkit/src/main/java/me/lucko/luckperms/bukkit/vault/VaultHookManager.java
@@ -78,7 +78,7 @@ public class VaultHookManager {
 
         if (permissionHook != null) {
             sm.unregister(Permission.class, permissionHook);
-            permissionHook.getExecutor().close();
+            permissionHook.getExecutor().shutdown();
             permissionHook = null;
         }
 
diff --git a/bukkit/src/main/java/me/lucko/luckperms/bukkit/vault/VaultPermissionHook.java b/bukkit/src/main/java/me/lucko/luckperms/bukkit/vault/VaultPermissionHook.java
index 7c980fef..55c9b686 100644
--- a/bukkit/src/main/java/me/lucko/luckperms/bukkit/vault/VaultPermissionHook.java
+++ b/bukkit/src/main/java/me/lucko/luckperms/bukkit/vault/VaultPermissionHook.java
@@ -50,7 +50,7 @@ import org.bukkit.entity.Player;
 
 import java.util.Arrays;
 import java.util.UUID;
-import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
 /**
@@ -77,7 +77,7 @@ public class VaultPermissionHook extends AbstractVaultPermission {
     private final LPBukkitPlugin plugin;
 
     // an executor for Vault modifications.
-    private final Executor executor;
+    private final ExecutorService executor;
 
     public VaultPermissionHook(LPBukkitPlugin plugin) {
         this.plugin = plugin;