diff --git a/pom.xml b/pom.xml
index e85832d26..b7133b1d2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -503,7 +503,7 @@
     <project.gson.version>2.8.6</project.gson.version>
     <project.protobuf-java.version>3.24.4</project.protobuf-java.version>
     <project.guava.version>32.0.0-jre</project.guava.version>
-    <project.appengine.version>2.0.19</project.appengine.version>
+    <project.appengine.version>2.0.21</project.appengine.version>
     <project.xpp3.version>1.1.4c</project.xpp3.version>
     <project.jdo2-api.version>2.3-20090302111651</project.jdo2-api.version>
     <project.datanucleus-core.version>3.2.2</project.datanucleus-core.version>