diff --git a/pom.xml b/pom.xml
index 910be749..0d1e13d1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,14 +6,13 @@
     <properties>
         <java.version>1.8</java.version>
         <spring-cloud.version>Greenwich.SR3</spring-cloud.version>
-        <undertow.version>2.1.3.Final</undertow.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <spring.framework.version>2.3.8.RELEASE</spring.framework.version>
+        <spring.framework.version>2.3.9.RELEASE</spring.framework.version>
     </properties>
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.3.8.RELEASE</version>
+        <version>2.3.9.RELEASE</version>
         <relativePath/>
     </parent>
     <groupId>com.dispose</groupId>
@@ -42,6 +41,7 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-undertow</artifactId>
+            <version>2.4.3</version>
         </dependency>
         <dependency>
             <groupId>org.jboss.xnio</groupId>