diff --git a/rmi/pom.xml b/rmi/pom.xml
index f4ce61d..54acd1d 100644
--- a/rmi/pom.xml
+++ b/rmi/pom.xml
@@ -22,7 +22,7 @@
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-collections4</artifactId>
-      <version>4.0</version>
+      <version>4.1</version>
     </dependency>
 
     <!-- https://mvnrepository.com/artifact/org.javassist/javassist -->