diff --git a/build.sbt b/build.sbt
index d59cdf98..84144c84 100644
--- a/build.sbt
+++ b/build.sbt
@@ -232,7 +232,7 @@ lazy val mdoc = project
       "com.googlecode.java-diff-utils" % "diffutils" % "1.3.0",
       "io.methvin" % "directory-watcher" % "0.15.0",
       // live reload
-      "io.undertow" % "undertow-core" % "2.2.14.Final",
+      "io.undertow" % "undertow-core" % "2.2.16.Final",
       "org.jboss.xnio" % "xnio-nio" % "3.8.5.Final",
       "org.slf4j" % "slf4j-api" % "1.7.33",
       "com.geirsson" %% "metaconfig-typesafe-config" % V.metaconfig,