diff --git a/OWLTools-Parent/pom.xml b/OWLTools-Parent/pom.xml
index 810c0e4c0..edce250c2 100644
--- a/OWLTools-Parent/pom.xml
+++ b/OWLTools-Parent/pom.xml
@@ -19,7 +19,7 @@
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<owlapi.version>4.2.6</owlapi.version>
-		<slf4j.version>1.7.10</slf4j.version>
+		<slf4j.version>1.7.34</slf4j.version>
 	</properties>
 
 	<build>
@@ -275,7 +275,7 @@
 			<dependency>
 				<groupId>org.apache.jena</groupId>
 				<artifactId>jena-core</artifactId>
-				<version>2.11.2</version>
+				<version>3.1.0</version>
 			</dependency>
 		</dependencies>
 	</dependencyManagement>