Update pom.xml

pom.xml

     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>1.2.1.RELEASE</version>
+        <version>1.5.3.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <properties>
     </dependencies>
 
 
-</project>
+</project>