diff --git a/piqnic-ext/pom.xml b/piqnic-ext/pom.xml
index 2c92744..1fbb91e 100644
--- a/piqnic-ext/pom.xml
+++ b/piqnic-ext/pom.xml
@@ -11,7 +11,7 @@
 
         <java.version>8</java.version>
         <jdk.version>1.8</jdk.version>
-        <jena.version>3.7.0</jena.version>
+        <jena.version>4.2.0</jena.version>
         <logback.version>1.2.3</logback.version>
         <slf4j.version>1.7.25</slf4j.version>
         <jettyVersion>9.4.9.v20180605</jettyVersion>