diff --git a/pom.xml b/pom.xml
index 70b68fe..cbe5ef9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -88,7 +88,7 @@
     <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>servlet-api</artifactId>
-      <version>2.4</version>
+      <version>2.5</version>
       <scope>provided</scope>
     </dependency>
     <dependency>
diff --git a/src/main/webapp/WEB-INF/web.xml b/src/main/webapp/WEB-INF/web.xml
index 832fb9b..0b0e839 100644
--- a/src/main/webapp/WEB-INF/web.xml
+++ b/src/main/webapp/WEB-INF/web.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
+<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
+	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 	<display-name>plantuml</display-name>
 	<context-param>
 		<param-name>org.eclipse.jetty.servlet.Default.welcomeServlets</param-name>