diff --git a/kotlin/pom.xml b/kotlin/pom.xml
index 1bb86f3b..b19a8051 100644
--- a/kotlin/pom.xml
+++ b/kotlin/pom.xml
@@ -42,7 +42,7 @@
     <dependency>
       <groupId>io.projectreactor</groupId>
       <artifactId>reactor-core</artifactId>
-      <version>3.6.5</version>
+      <version>3.6.6</version>
       <scope>test</scope>
     </dependency>
   </dependencies>