diff --git a/samples/client/petstore/java/vertx-no-nullable/build.gradle b/samples/client/petstore/java/vertx-no-nullable/build.gradle
index 20710f894a8d..2a59d30103f8 100644
--- a/samples/client/petstore/java/vertx-no-nullable/build.gradle
+++ b/samples/client/petstore/java/vertx-no-nullable/build.gradle
@@ -32,6 +32,7 @@ ext {
     jackson_databind_version = "2.10.4"
     vertx_version = "3.4.2"
     junit_version = "4.13"
+    jackson_threeten_version = "2.9.10"
 }
 
 dependencies {
@@ -43,7 +44,7 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_databind_version"
     compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
-    compile "com.github.joschi.jackson:jackson-datatype-threetenbp:$jackson_version"
+    compile "com.github.joschi.jackson:jackson-datatype-threetenbp:jackson_threeten_version"
     compile 'javax.annotation:javax.annotation-api:1.3.2'
     testCompile "junit:junit:$junit_version"
     testCompile "io.vertx:vertx-unit:$vertx_version"