diff --git a/extras/rya.pcj.fluo/pcj.fluo.client/pom.xml b/extras/rya.pcj.fluo/pcj.fluo.client/pom.xml
index 50fa480a4..90aa7f9c6 100644
--- a/extras/rya.pcj.fluo/pcj.fluo.client/pom.xml
+++ b/extras/rya.pcj.fluo/pcj.fluo.client/pom.xml
@@ -90,7 +90,7 @@ under the License.
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.5</version>
+            <version>2.17.1</version>
         </dependency> 
         
         <!-- Testing dependencies. -->