diff --git a/dcm4chee-proxy-tool/pom.xml b/dcm4chee-proxy-tool/pom.xml
index 7c9f221..823e3f4 100644
--- a/dcm4chee-proxy-tool/pom.xml
+++ b/dcm4chee-proxy-tool/pom.xml
@@ -162,7 +162,7 @@
     <dependency>
       <groupId>commons-collections</groupId>
       <artifactId>commons-collections</artifactId>
-      <version>3.2.1</version>
+      <version>3.2.2</version>
     </dependency>
     <dependency>
       <groupId>antlr</groupId>