Exclude unnecessary GWT dependencies
<artifactId>gwt-user</artifactId>
<version>2.5.0</version>
<scope>provided</scope>
+ <exclusions>
+ <exclusion>
+ <groupId>javax.validation</groupId>
+ <artifactId>validation-api</artifactId>
+ </exclusion>
+ <exclusion>
+ <groupId>org.json</groupId>
+ <artifactId>json</artifactId>
+ </exclusion>
+ </exclusions>
</dependency>
</dependencies>
</project>
