diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
index cc5e71f..e0224e5 100644
--- a/src/main/resources/Documentation/config.md
+++ b/src/main/resources/Documentation/config.md
@@ -34,8 +34,6 @@
 
 Values should use common time unit suffixes to express their setting:
 
-* s, sec, second, seconds
-* m, min, minute, minutes
 * h, hr, hour, hours
 * d, day, days
 * w, week, weeks (`1 week` is treated as `7 days`)
@@ -44,6 +42,8 @@
 
 If a time unit suffix is not specified, `hours` is assumed.
 
+Time intervals smaller than one hour are not supported.
+
 If 'cleanupInterval' is not present in the configuration, the
 cleanup operation is triggered every 24 hours.