diff --git a/pom.xml b/pom.xml
index 25fcdd1..778d68b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,7 @@
     </modules>
 
     <properties>
-        <spring-boot.version>1.5.15.RELEASE</spring-boot.version>
+        <spring-boot.version>1.5.21.RELEASE</spring-boot.version>
     </properties>
 
     <dependencyManagement>