diff --git a/app/utils/rag_chat.py b/app/utils/rag_chat.py
index a76929d..b40831f 100644
--- a/app/utils/rag_chat.py
+++ b/app/utils/rag_chat.py
@@ -34,7 +34,8 @@ class RAGChatService:
         # Available document collections
         self.doc_collections = [
             "docs_crumbforest",
-            "docs_rz_nullfeld"
+            "docs_rz_nullfeld",
+            "docs_crumbcodex"
         ]
 
     def search_documents(