diff --git a/src/main/java/cc/carm/plugin/commanditem/item/ItemRestrictions.java b/src/main/java/cc/carm/plugin/commanditem/item/ItemRestrictions.java
index a3ea35b..44658b0 100644
--- a/src/main/java/cc/carm/plugin/commanditem/item/ItemRestrictions.java
+++ b/src/main/java/cc/carm/plugin/commanditem/item/ItemRestrictions.java
@@ -94,4 +94,5 @@ public class ItemRestrictions {
                 TimeDateUtils.parseTimeMillis(section.getString("time.end"))
         );
     }
+
 }
diff --git a/src/main/java/cc/carm/plugin/commanditem/item/ItemStackConfig.java b/src/main/java/cc/carm/plugin/commanditem/item/ItemStackConfig.java
index 6cb0357..bbc98e8 100644
--- a/src/main/java/cc/carm/plugin/commanditem/item/ItemStackConfig.java
+++ b/src/main/java/cc/carm/plugin/commanditem/item/ItemStackConfig.java
@@ -30,7 +30,7 @@ public class ItemStackConfig {
         this(original, null, null, null);
     }
 
-    public ItemStackConfig(@Nullable ItemStack original,
+    private ItemStackConfig(@Nullable ItemStack original,
                            @Nullable Material material, @Nullable String displayName, @Nullable List<String> lore) {
         this.original = original;
         this.material = material;
diff --git a/src/main/java/cc/carm/plugin/commanditem/listener/ItemListener.java b/src/main/java/cc/carm/plugin/commanditem/listener/ItemListener.java
index 180028d..8392463 100644
--- a/src/main/java/cc/carm/plugin/commanditem/listener/ItemListener.java
+++ b/src/main/java/cc/carm/plugin/commanditem/listener/ItemListener.java
@@ -127,7 +127,7 @@ public class ItemListener implements Listener {
         if (!this.clickTime.containsKey(uuid)) return 0;
         if (!PluginConfig.CoolDown.ENABLE.get()) return 0;
         long start = this.clickTime.get(uuid);
-        return (int) (PluginConfig.CoolDown.TIME.get() - ((System.currentTimeMillis() - start) / 1000)) + 1;
+        return (int) ((PluginConfig.CoolDown.TIME.get() - (System.currentTimeMillis() - start)) / 1000) + 1;
     }