diff --git a/modules/recommender/federated-recommender/pom.xml b/modules/recommender/federated-recommender/pom.xml
index 354348a..75cae1a 100644
--- a/modules/recommender/federated-recommender/pom.xml
+++ b/modules/recommender/federated-recommender/pom.xml
@@ -56,7 +56,7 @@
 		<dependency>
 			<groupId>commons-collections</groupId>
 			<artifactId>commons-collections</artifactId>
-			<version>3.2.1</version>
+			<version>3.2.2</version>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.lucene</groupId>