diff --git a/README.md b/README.md
index e792adcf6db36454e70c6b07a70cd963b8c5181d..255ef5e3801aac4976fc50180f853ccc1604e668 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Currently, there are _no plans to migrate_ the Energy ADE 3 citygml4j module to
 
 The following modules are supported at the moment:
 
--  Core (AbstractBuilding, RefurbishmentMeasures, WeatherData)
+-  Core (AbstractBuilding, RefurbishmentMeasures, WeatherData, CityObjectRelation)
 -  Resource
 -  UrbanFunctionArea
 -  WeatherStation