diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index ce006fe..4dfbbd9 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -6,7 +6,7 @@ javalin = { module= "io.javalin:javalin-bundle", version = "6.3.0" }
 jena = { module = "org.apache.jena:apache-jena-libs", version = "4.10.0" }
 junit-api = { module = "org.junit.jupiter:junit-jupiter-api", version.ref = "junit" }
 junit-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref = "junit" }
-wldt = { module = "io.github.wldt:wldt-core", version = "0.3.0" }
+wldt = { module = "io.github.wldt:wldt-core", version = "0.4.0" }
 wot-servient = { module = "io.github.sane-city:wot-servient", version = "1.16-SNAPSHOT" }
 
 [bundles]