diff --git a/upper-constraints.txt b/upper-constraints.txt
index bb2e97e4d..299f00c36 100644
--- a/upper-constraints.txt
+++ b/upper-constraints.txt
@@ -106,7 +106,7 @@ pyinotify===0.9.6
 debtcollector===1.21.0
 requests-unixsocket===0.1.5
 asn1crypto===0.24.0
-croniter===0.3.27
+croniter===0.3.29
 octavia-lib===1.1.1
 python-watcherclient===2.2.0
 MarkupSafe===1.1.1