diff --git a/upper-constraints.txt b/upper-constraints.txt
index f96cdade41..961e9620fb 100644
--- a/upper-constraints.txt
+++ b/upper-constraints.txt
@@ -357,7 +357,7 @@ oslo.serialization===2.29.2
 warlock===1.3.3
 exabgp===4.1.2
 sphinxcontrib-httpdomain===1.7.0
-metalsmith===0.14.0
+metalsmith===0.15.0
 s3transfer===0.2.1
 text-unidecode===1.2
 sphinxcontrib-svg2pdfconverter===0.1.0