diff --git a/build.gradle b/build.gradle
index f439e23a0d1acd9808af9f450425e49efc6bebcb..4a261926c068b7527d4654c4e591be7d63a43380 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,4 +1,5 @@
 plugins {
+    id 'com.github.ben-manes.versions' version '0.42.0'
     id 'java-library'
     id 'application'
     id 'org.jastadd' version "${jastaddgradle_version}"
diff --git a/gradle.properties b/gradle.properties
index 3d51a4088c53689a6457801f3c9068df8a16999d..0e0cc086ffe4f79f86c59464b82fb53d4e99d4cb 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
-relast_version = 0.3.0-137
+relast_version = 0.4.0
 relast2uml_version = 0.3.7-59
 jupyter_version = 5.8.2
 assertj_version = 3.22.0
 grammar2uml_version = 0.2.1
-jastaddgradle_version = 1.14.5
\ No newline at end of file
+jastaddgradle_version = 1.14.5