diff --git a/approvaltests-tests/pom.xml b/approvaltests-tests/pom.xml
index 952a7d85..67b60ea9 100644
--- a/approvaltests-tests/pom.xml
+++ b/approvaltests-tests/pom.xml
@@ -12,7 +12,7 @@
     <packaging>jar</packaging>
 
     <properties>
-        <kotlin.version>2.3.20</kotlin.version>
+        <kotlin.version>2.3.21</kotlin.version>
     </properties>
 
     <dependencyManagement>