diff --git a/pom.xml b/pom.xml
index 6fd8d86..0c7c7be 100644
--- a/pom.xml
+++ b/pom.xml
@@ -120,6 +120,13 @@
             <scope>compile</scope>
         </dependency>
 
+        <dependency>
+            <groupId>org.jetbrains</groupId>
+            <artifactId>annotations</artifactId>
+            <version>22.0.0</version>
+            <scope>compile</scope>
+        </dependency>
+
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
diff --git a/src/main/java/cc/carm/app/aliddns/Main.java b/src/main/java/cc/carm/app/aliddns/Main.java
index f4ea8c6..7c2bc90 100644
--- a/src/main/java/cc/carm/app/aliddns/Main.java
+++ b/src/main/java/cc/carm/app/aliddns/Main.java
@@ -2,7 +2,7 @@
 
 import cc.carm.app.aliddns.manager.ConfigManager;
 import cc.carm.app.aliddns.manager.RequestManager;
-import com.sun.istack.internal.NotNull;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
 import java.util.Timer;
diff --git a/src/main/java/cc/carm/app/aliddns/manager/ConfigManager.java b/src/main/java/cc/carm/app/aliddns/manager/ConfigManager.java
index 3b599a7..54ff6d1 100644
--- a/src/main/java/cc/carm/app/aliddns/manager/ConfigManager.java
+++ b/src/main/java/cc/carm/app/aliddns/manager/ConfigManager.java
@@ -1,9 +1,9 @@
 package cc.carm.app.aliddns.manager;
 
 import com.google.common.base.Charsets;
-import com.sun.istack.internal.Nullable;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
+import org.jetbrains.annotations.Nullable;
 
 import java.io.*;
 import java.net.URL;
diff --git a/src/main/java/cc/carm/app/aliddns/model/UpdateRequest.java b/src/main/java/cc/carm/app/aliddns/model/UpdateRequest.java
index af8ee66..82975ab 100644
--- a/src/main/java/cc/carm/app/aliddns/model/UpdateRequest.java
+++ b/src/main/java/cc/carm/app/aliddns/model/UpdateRequest.java
@@ -11,8 +11,8 @@
 import com.aliyuncs.alidns.model.v20150109.UpdateDomainRecordResponse;
 import com.aliyuncs.exceptions.ClientException;
 import com.aliyuncs.profile.DefaultProfile;
-import com.sun.istack.internal.NotNull;
 import org.bukkit.configuration.ConfigurationSection;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;