diff --git a/pmd/pom.xml b/pmd/pom.xml
index d7acfc425d..31b476e28f 100644
--- a/pmd/pom.xml
+++ b/pmd/pom.xml
@@ -358,6 +358,7 @@
       <plugin>
         <groupId>com.atlassian.maven.plugins</groupId>
           <artifactId>maven-clover2-plugin</artifactId>
+          <version>2.5.1</version>
           <configuration>
           <jdk>1.5</jdk>
           <licenseLocation>tools/config/clover2.license</licenseLocation>
@@ -372,6 +373,15 @@
         </executions>
       </plugin>
 
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-site-plugin</artifactId>
+        <version>2.0</version>
+        <configuration>
+          <xdocDirectory>${basedir}/xdocs</xdocDirectory>
+        </configuration>
+      </plugin>
+
     </plugins>
   </build>
   <dependencies>
@@ -431,11 +441,13 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jxr-plugin</artifactId>
+        <version>2.1</version>
       </plugin>
 
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
+        <version>2.5</version>
         <reportSets>
           <reportSet>
             <reports>
@@ -449,14 +461,6 @@
         </reportSets>
       </plugin>
 
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-site-plugin</artifactId>
-        <configuration>
-          <xdocDirectory>${basedir}/xdocs</xdocDirectory>
-        </configuration>
-      </plugin>
-
       <!--
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
@@ -493,6 +497,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-checkstyle-plugin</artifactId>
+        <version>2.2</version>
         <configuration>
           <configLocation>tools/config/checkstyle-config.xml</configLocation>
         </configuration>
@@ -501,6 +506,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-project-info-reports-plugin</artifactId>
+        <version>2.1.1</version>
         <reportSets>
           <reportSet>
             <reports>
@@ -518,11 +524,14 @@
       </plugin>
 
       <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
+        <version>2.4.3</version>
       </plugin>
       <plugin>
         <groupId>com.atlassian.maven.plugins</groupId>
         <artifactId>maven-clover2-plugin</artifactId>
+        <version>2.5.1</version>
         <configuration>
           <licenseLocation>tools/config/clover2.license</licenseLocation>
         </configuration>