--- a/mod_cloud_notify/README.markdown	Tue Mar 07 10:24:58 2023 +0000
+++ b/mod_cloud_notify/README.markdown	Tue Mar 07 10:26:57 2023 +0000
@@ -93,6 +93,9 @@
 Compatibility
 =============
 
+**Note:** This module should be used with Lua 5.2 and higher. Using it with
+Lua 5.1 may cause push notifications to not be sent to some clients.
+
 ------ -----------------------------------------------------------------------------
   trunk  Works
   0.12   Works