diff --git a/weave_query/requirements.legacy.txt b/weave_query/requirements.legacy.txt
index 64eed6a634d..960ca1cb393 100644
--- a/weave_query/requirements.legacy.txt
+++ b/weave_query/requirements.legacy.txt
@@ -62,3 +62,5 @@ uuid-utils>=0.9.0
 
 flask_cors
 
+
+anyio==3.6.2