diff --git a/server/api-service/pom.xml b/server/api-service/pom.xml
index 8585a5bb..1df680c9 100644
--- a/server/api-service/pom.xml
+++ b/server/api-service/pom.xml
@@ -202,7 +202,7 @@
             <dependency>
                 <groupId>io.projectreactor</groupId>
                 <artifactId>reactor-core</artifactId>
-                <version>3.4.29</version>
+                <version>3.5.9</version>
             </dependency>
 
             <dependency>