diff --git a/samples/server/petstore/undertow/pom.xml b/samples/server/petstore/undertow/pom.xml
index f5e8cc42f31..762a64ca4f4 100644
--- a/samples/server/petstore/undertow/pom.xml
+++ b/samples/server/petstore/undertow/pom.xml
@@ -30,7 +30,7 @@
         <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>2.3.20.Final</version.undertow>
         <version.jsonpath>2.2.0</version.jsonpath>
         <version.httpclient>4.5.2</version.httpclient>
         <version.httpasyncclient>4.1.2</version.httpasyncclient>