diff --git a/setup.py b/setup.py
index 7cb688bd..9c9aa907 100644
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,10 @@ requires = [
     # TODO: why do we need to cap this?  breaks tailbone.db zope stuff somehow
     'zope.sqlalchemy<1.0',              # 0.7                   0.7.7
 
-    # TODO: apparently they jumped from 0.1 to 0.9 and that broke us...must investigate
+    # TODO: apparently they jumped from 0.1 to 0.9 and that broke us...
+    # (0.1 was released on 2014-09-14 and then 0.9 came out on 2018-09-27)
+    # (i've cached 0.1 at pypi.rattailproject.org just in case it disappears)
+    # (still, probably a better idea is to refactor so we can use 0.9)
     'webhelpers2_grid==0.1',            # 0.1
 
     'ColanderAlchemy',                  # 0.3.3