diff --git a/renovate.json b/renovate.json
index 959d019..48df722 100644
--- a/renovate.json
+++ b/renovate.json
@@ -2,5 +2,18 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "github>SchweizerischeBundesbahnen/casc-renovate-preset-polarion-java"
+  ],
+  "customManagers": [
+      {
+      "customType": "regex",
+      "fileMatch": [
+        "versions.properties$"
+      ],
+      "datasourceTemplate": "github-releases",
+      "depNameTemplate": "SchweizerischeBundesbahnen/weasyprint-service",
+      "matchStrings": [
+        "weasyprint-service.version=(?<currentValue>.*)"
+      ]
+    }
   ]
 }