diff --git a/README.md b/README.md
index 9a8b281..4516ddc 100644
--- a/README.md
+++ b/README.md
@@ -156,7 +156,7 @@ starting point.
 KH_DOCSTORE=(Elasticsearch | LanceDB | SimpleFileDocumentStore)
 
 # setup your preferred vectorstore (for vector-based search)
-KH_VECTORSTORE=(ChromaDB | LanceDB
+KH_VECTORSTORE=(ChromaDB | LanceDB | InMemory)
 
 # Enable / disable multimodal QA
 KH_REASONINGS_USE_MULTIMODAL=True