diff --git a/requirements.txt b/requirements.txt
index 73ca0f87b..ac3b353b8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,4 +69,6 @@ imap_tools==1.5.0  # Used by metagpt/tools/libs/email_login.py
 qianfan==0.3.2
 dashscope==1.14.1
 rank-bm25==0.2.2  # for tool recommendation
-jieba==0.42.1  # for tool recommendation
\ No newline at end of file
+jieba==0.42.1  # for tool recommendation
+# llama-index-vector-stores-elasticsearch~=0.2.5 # Used by `metagpt/memory/longterm_memory.py`
+# llama-index-vector-stores-chroma~=0.1.10 # Used by `metagpt/memory/longterm_memory.py`
\ No newline at end of file