diff --git a/pom.xml b/pom.xml
index 3d23dfbb8..358c3ac7c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -138,7 +138,7 @@ Supported protocols include Echo, Finger, FTP, NNTP, NTP, POP3(S), SMTP(S), Teln
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
-            <version>3.20.0</version>
+            <version>3.21.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>