diff --git a/src/main/java/com/fanruan/api/cal/CalculatorKit.java b/src/main/java/com/fanruan/api/cal/CalculatorKit.java
index e86e410..1874e59 100644
--- a/src/main/java/com/fanruan/api/cal/CalculatorKit.java
+++ b/src/main/java/com/fanruan/api/cal/CalculatorKit.java
@@ -11,7 +11,7 @@ import com.fr.stable.StringUtils;
 import com.fr.stable.script.CalculatorProvider;
 import com.fr.stable.script.NameSpace;
 import com.fr.stable.web.SessionProvider;
-import com.fr.third.javax.annotation.Nullable;
+import org.jetbrains.annotations.Nullable;
 import com.fr.web.core.ReportSessionIDInfor;
 import com.fr.web.core.TemplateSessionIDInfo;
 import com.fr.web.session.SessionIDInfo;