diff --git a/pom.xml b/pom.xml
index bd4f7fa..11eff4b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,7 +39,7 @@
     <!-- plugins -->
     <maven-compiler.version>3.8.1</maven-compiler.version>
     <maven-surefire.version>2.22.2</maven-surefire.version>
-    <kotlin.version>1.8.10</kotlin.version>
+    <kotlin.version>1.9.21</kotlin.version>
     <mockk.version>1.13.4</mockk.version>
     <kotest.version>5.5.5</kotest.version>
   </properties>