diff --git a/src/userguide/pom.xml b/src/userguide/pom.xml
index 46b2939522..d898809f32 100644
--- a/src/userguide/pom.xml
+++ b/src/userguide/pom.xml
@@ -103,7 +103,7 @@
       <dependency>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-lang3</artifactId>
-          <version>3.1</version>
+          <version>3.18.0</version>
       </dependency>
       <dependency>
           <groupId>org.apache.commons</groupId>