diff --git a/Subgraph_Isomorphism_v2/pom.xml b/Subgraph_Isomorphism_v2/pom.xml
index f645278..1fa130e 100644
--- a/Subgraph_Isomorphism_v2/pom.xml
+++ b/Subgraph_Isomorphism_v2/pom.xml
@@ -26,7 +26,7 @@
 	<dependency>
 	    <groupId>org.apache.commons</groupId>
 	    <artifactId>commons-collections4</artifactId>
-	    <version>4.0</version>
+	    <version>4.1</version>
 	</dependency>
 	
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