How to configure spring boot dev tool if building from sources

[andyabcd1]

I have an ongoing thingsboard project that is built from sources. Every customized feature is created in the application folder.

Now I want to integrate spring-boot-devtools to the project, so I updated
application/pom.xml

However, there is an error.

Dependency 'org.springframework.boot:spring-boot-devtools:' not found 
Tag name: artifactId Description : The unique id for an artifact produced by the project group, e. g. maven-artifact. Version : 3.0.0+

Am I doing it in a wrong way?