diff --git a/build.gradle b/build.gradle
index 9dc9fe6..664b778 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,7 +17,7 @@ static def getDate() {
 
 jar {
     manifest{
-        attributes ("Manifest-Version" : "10.0", "Build" : getDate())
+        attributes ("Implementation-Version" : "10.0", "Specification-Version" : getDate())
     }
     baseName 'finekit'
     version archiveVersion.get() + "-" + getDate()
diff --git a/src/main/java/com/fanruan/api/FineKit.java b/src/main/java/com/fanruan/api/FineKit.java
index 21e188d..c1b02db 100644
--- a/src/main/java/com/fanruan/api/FineKit.java
+++ b/src/main/java/com/fanruan/api/FineKit.java
@@ -1,8 +1,5 @@
 package com.fanruan.api;
 
-import java.io.IOException;
-import java.util.Properties;
-
 /**
  * @author richie
  * @version 10.0
@@ -10,19 +7,13 @@ import java.util.Properties;
  */
 public class FineKit {
 
-    private static String version;
-    private static String build;
+    private final static String version;
+    private final static String build;
 
     static {
-        Properties properties = new Properties();
-        try {
-            properties.load(FineKit.class.getResourceAsStream("/version.properties"));
-            version = properties.getProperty("version");
-            build = properties.getProperty("build");
-        } catch (IOException ignore) {
-            version = "10.0";
-            build = "20190815";
-        }
+        Package pkg = FineKit.class.getPackage();
+        version = pkg.getImplementationVersion();
+        build = pkg.getSpecificationVersion();
     }
 
     /**