diff --git a/pom.xml b/pom.xml
index 3070e13..afd0305 100644
--- a/pom.xml
+++ b/pom.xml
@@ -891,14 +891,12 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>buildnumber-maven-plugin</artifactId>
-                <version>${plugin.buildnumber.version}</version>
             </plugin>
 
             <!-- enforce integration build requirements -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-enforcer-plugin</artifactId>
-                <version>${plugin.enforcer.version}</version>
                 <executions>
                     <execution>
                         <id>enforce-files-exist</id>