diff --git a/contribs/bill-burke-book/ex11_2/pom.xml b/contribs/bill-burke-book/ex11_2/pom.xml
index 28e2236b8..dffa4941e 100644
--- a/contribs/bill-burke-book/ex11_2/pom.xml
+++ b/contribs/bill-burke-book/ex11_2/pom.xml
@@ -119,7 +119,7 @@
         <dependency>
             <groupId>commons-collections</groupId>
             <artifactId>commons-collections</artifactId>
-            <version>3.1</version>
+            <version>3.2.2</version>
         </dependency>
     </dependencies>
     <build>