diff --git a/a2a/pom.xml b/a2a/pom.xml
index 7f22964b4..3ac6f71fb 100644
--- a/a2a/pom.xml
+++ b/a2a/pom.xml
@@ -19,6 +19,7 @@
     <a2a.sdk.version>0.3.2.Final</a2a.sdk.version>
     <google.adk.version>${project.version}</google.adk.version>
     <guava.version>33.0.0-jre</guava.version>
+    <jackson.annotations.version>2.22</jackson.annotations.version>
     <jackson.version>2.22.0</jackson.version>
     <jspecify.version>1.0.0</jspecify.version>
     <slf4j.version>2.0.17</slf4j.version>
@@ -44,7 +45,7 @@
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-annotations</artifactId>
-      <version>${jackson.version}</version>
+      <version>${jackson.annotations.version}</version>
     </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>