diff --git a/samples/server/petstore/undertow/pom.xml b/samples/server/petstore/undertow/pom.xml
index 77f1fe52ad2..bdb7d8f7d23 100644
--- a/samples/server/petstore/undertow/pom.xml
+++ b/samples/server/petstore/undertow/pom.xml
@@ -28,7 +28,7 @@
         <version.logback>1.1.7</version.logback>
         <version.junit>4.12</version.junit>
         <version.mockito>2.1.0-beta.124</version.mockito>
-        <version.undertow>1.4.0.Final</version.undertow>
+        <version.undertow>2.3.5.Final</version.undertow>
         <version.jsonpath>2.2.0</version.jsonpath>
         <version.httpclient>4.5.2</version.httpclient>
         <version.httpasyncclient>4.1.2</version.httpasyncclient>