diff --git a/pom.xml b/pom.xml
index 20cab68b..a4c1c40f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,7 +62,7 @@
         <okhttp3.version>4.12.0</okhttp3.version>
         <ktor.version>1.6.8</ktor.version>
         <kotlin.code.style>official</kotlin.code.style>
-        <kotlin.version>1.9.10</kotlin.version>
+        <kotlin.version>1.9.20</kotlin.version>
         <mock-oauth2-server.version>2.0.0</mock-oauth2-server.version>
         <groovy.version>3.0.19</groovy.version>
         <nimbus.jose.jwt.version>9.37</nimbus.jose.jwt.version>
diff --git a/token-validation-spring/pom.xml b/token-validation-spring/pom.xml
index b9bb0e65..cb10759c 100644
--- a/token-validation-spring/pom.xml
+++ b/token-validation-spring/pom.xml
@@ -10,7 +10,7 @@
     <name>token-validation-spring</name>
 
     <properties>
-        <kotlin.version>1.9.10</kotlin.version>
+        <kotlin.version>1.9.20</kotlin.version>
     </properties>
     <dependencies>
         <dependency>