diff --git a/docs/data-model/data-model.md b/docs/data-model/data-model.md
index 64853be..499771e 100644
--- a/docs/data-model/data-model.md
+++ b/docs/data-model/data-model.md
@@ -1,6 +1,6 @@
 # Data model
 
-The OpenAIRE Research Graph comprises several types of entities and [relationships](./relationships) among them.
+The OpenAIRE Research Graph comprises several types of [entities](../category/entities) and [relationships](./relationships) among them.
 
 The latest version of the JSON schema can be found on [Bulk downloads](../download).