diff --git a/spring-boot-dependencies/pom.xml b/spring-boot-dependencies/pom.xml
index 5147efd47b..38c6db0f7d 100644
--- a/spring-boot-dependencies/pom.xml
+++ b/spring-boot-dependencies/pom.xml
@@ -157,7 +157,7 @@
 		<thymeleaf-layout-dialect.version>1.3.1</thymeleaf-layout-dialect.version>
 		<thymeleaf-extras-data-attribute.version>1.3</thymeleaf-extras-data-attribute.version>
 		<tomcat.version>8.0.30</tomcat.version>
-		<undertow.version>1.3.5.Final</undertow.version>
+		<undertow.version>1.3.9.Final</undertow.version>
 		<velocity.version>1.7</velocity.version>
 		<velocity-tools.version>2.0</velocity-tools.version>
 		<webjars-hal-browser.version>9f96c74</webjars-hal-browser.version>