diff --git a/config.txt b/config.txt
index a63b7bd..6124dca 100644
--- a/config.txt
+++ b/config.txt
@@ -9,7 +9,7 @@ PREF_STARTUP=general.startup.calendar
 
 SM_ID={92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}
 SM_MIN_VERSION=2.14
-SM_MAX_VERSION=2.40
+SM_MAX_VERSION=2.39
 
 TB_ID={3550f703-e582-4d05-9a08-453d09bdfdc6}
 TB_MIN_VERSION=17.0