diff --git a/validator/pom.xml b/validator/pom.xml
index 115fdb7c..3da9242f 100644
--- a/validator/pom.xml
+++ b/validator/pom.xml
@@ -89,6 +89,12 @@
             <version>5.10.2</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>2.0.9</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
     <build>
         <pluginManagement>