title: Error in pom.xml due to ribbon dependency
body: <p>Getting the project build error message </p>
  
  <pre><code>Project build error: 
           'dependencies.dependency.version' for org.springframework.cloud:spring-cloud-starter-ribbon:
  </code></pre>
  
  <p>This my <code>pom.xml</code> file.</p>
  
  <pre><code> &lt;?xml version="1.0" encoding="UTF-8"?&gt;
          &lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"&gt;
              &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
              &lt;parent&gt;
                  &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                  &lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
                  &lt;version&gt;2.1.4.RELEASE&lt;/version&gt;
                  &lt;relativePath/&gt; &lt;!-- lookup parent from repository --&gt;
              &lt;/parent&gt;
              &lt;groupId&gt;com.in28minutes.microservices&lt;/groupId&gt;
              &lt;artifactId&gt;currency-conversion-service&lt;/artifactId&gt;
              &lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt;
              &lt;name&gt;currency-conversion-service&lt;/name&gt;
              &lt;description&gt;Demo project for Spring Boot&lt;/description&gt;
  
              &lt;properties&gt;
                  &lt;java.version&gt;1.8&lt;/java.version&gt;
                  &lt;spring-cloud.version&gt;Greenwich.SR3&lt;/spring-cloud.version&gt;
              &lt;/properties&gt;
  
              &lt;dependencies&gt;
                  &lt;dependency&gt;
                      &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                      &lt;artifactId&gt;spring-boot-starter-actuator&lt;/artifactId&gt;
                  &lt;/dependency&gt;
                  &lt;dependency&gt;
                      &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                      &lt;artifactId&gt;spring-boot-starter-web&lt;/artifactId&gt;
                  &lt;/dependency&gt;
                  &lt;dependency&gt;
                      &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
                      &lt;artifactId&gt;spring-cloud-starter-config&lt;/artifactId&gt;
                  &lt;/dependency&gt;
                  &lt;dependency&gt;
                      &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
                       &lt;artifactId&gt;spring-cloud-netflix-core&lt;/artifactId&gt;
                  &lt;/dependency&gt;
                  &lt;!-- &lt;dependency&gt;
                      &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
                      &lt;artifactId&gt;spring-cloud-starter-ribbon&lt;/artifactId&gt;
                  &lt;/dependency&gt;  --&gt;
                  &lt;dependency&gt;
                      &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
                      &lt;artifactId&gt;spring-cloud-starter-openfeign&lt;/artifactId&gt;
                  &lt;/dependency&gt;
                  &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
              &lt;artifactId&gt;spring-cloud-starter-ribbon&lt;/artifactId&gt;
          &lt;/dependency&gt;
                  &lt;dependency&gt;
                      &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                      &lt;artifactId&gt;spring-boot-devtools&lt;/artifactId&gt;
                      &lt;scope&gt;runtime&lt;/scope&gt;
                      &lt;optional&gt;true&lt;/optional&gt;
                  &lt;/dependency&gt;
                  &lt;dependency&gt;
                      &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                      &lt;artifactId&gt;spring-boot-starter-test&lt;/artifactId&gt;
                      &lt;scope&gt;test&lt;/scope&gt;
                  &lt;/dependency&gt;
              &lt;/dependencies&gt;
  
              &lt;dependencyManagement&gt;
                  &lt;dependencies&gt;
                      &lt;dependency&gt;
                          &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
                          &lt;artifactId&gt;spring-cloud-dependencies&lt;/artifactId&gt;
                          &lt;version&gt;${spring-cloud.version}&lt;/version&gt;
                          &lt;type&gt;pom&lt;/type&gt;
                          &lt;scope&gt;import&lt;/scope&gt;
                      &lt;/dependency&gt;
                  &lt;/dependencies&gt;
              &lt;/dependencyManagement&gt;
  
              &lt;build&gt;
                  &lt;plugins&gt;
                      &lt;plugin&gt;
                          &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                          &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
                      &lt;/plugin&gt;
                  &lt;/plugins&gt;
              &lt;/build&gt;
  
          &lt;/project&gt;
  </code></pre>