diff --git a/spring-5/pom.xml b/spring-5/pom.xml
index eadfb5e512..a242c29933 100644
--- a/spring-5/pom.xml
+++ b/spring-5/pom.xml
@@ -149,6 +149,7 @@
     </build>
 
     <properties>
+        <spring-boot.version>2.1.9.RELEASE</spring-boot.version>
         <geronimo-json_1.1_spec.version>1.0</geronimo-json_1.1_spec.version>
         <asciidoctor-plugin.version>1.5.6</asciidoctor-plugin.version>
         <commons-collections4.version>4.1</commons-collections4.version>