diff --git a/project.xml b/project.xml
index b1e241e..7f7535f 100644
--- a/project.xml
+++ b/project.xml
@@ -170,13 +170,21 @@
     <dependency>
       <groupId>log4j</groupId>
       <artifactId>log4j</artifactId>
-      <version>1.2.6</version>
+      <version>1.2.12</version>
+      <properties>
+        <comment>
+Runtime Optional. 
+1.2.12 required for compilation but 1.2.6 onwards supported at runtime.</comment>
+      </properties>
     </dependency>
     
     <dependency>
       <groupId>logkit</groupId>
       <artifactId>logkit</artifactId>
       <version>1.0.1</version>
+      <properties>
+        <comment>Runtime Optional</comment>
+      </properties>
     </dependency>
 
     <dependency>
@@ -184,6 +192,7 @@
       <artifactId>junit</artifactId>
       <version>3.8.1</version>
       <properties>
+        <comment>Used for testing only.</comment>
         <scope>test</scope>
       </properties>
     </dependency>
@@ -192,12 +201,18 @@
       <groupId>avalon-framework</groupId>
       <artifactId>avalon-framework</artifactId>
       <version>4.1.3</version>
+      <properties>
+        <comment>Runtime Optional</comment>
+      </properties>
     </dependency>
     
     <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>servlet-api</artifactId>
       <version>2.3</version>
+      <properties>
+        <comment>Used only by servlet filter. Not used by core logging implementation.</comment>
+      </properties>
     </dependency>
     
   </dependencies>