diff --git a/spring-boot-project/spring-boot-dependencies/build.gradle b/spring-boot-project/spring-boot-dependencies/build.gradle
index df6c8651b7d..a936d8d1bd5 100644
--- a/spring-boot-project/spring-boot-dependencies/build.gradle
+++ b/spring-boot-project/spring-boot-dependencies/build.gradle
@@ -1578,7 +1578,7 @@ bom {
 			]
 		}
 	}
-	library("Undertow", "2.3.8.Final") {
+	library("Undertow", "2.3.9.Final") {
 		group("io.undertow") {
 			modules = [
 				"undertow-core",