diff --git a/resources/dev/elastic-openapi-codegen-php/pom.xml b/resources/dev/elastic-openapi-codegen-php/pom.xml
index 3c7d9b9..ef9f75b 100644
--- a/resources/dev/elastic-openapi-codegen-php/pom.xml
+++ b/resources/dev/elastic-openapi-codegen-php/pom.xml
@@ -11,7 +11,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <openapi-generator-version>3.3.4</openapi-generator-version>
+    <openapi-generator-version>5.1.0</openapi-generator-version>
     <maven-plugin-version>1.0.0</maven-plugin-version>
     <junit-version>4.8.1</junit-version>
   </properties>