diff --git a/boat-quay/boat-quay-lint/pom.xml b/boat-quay/boat-quay-lint/pom.xml
index 0b8a22d2f..b4e9f5e3b 100644
--- a/boat-quay/boat-quay-lint/pom.xml
+++ b/boat-quay/boat-quay-lint/pom.xml
@@ -17,7 +17,7 @@
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>${basedir}/../${aggregate.report.dir}
         </sonar.coverage.jacoco.xmlReportPaths>
-        <kotlin.version>2.0.21</kotlin.version>
+        <kotlin.version>2.1.20</kotlin.version>
         <kotlin.compiler.incremental>false</kotlin.compiler.incremental>
     </properties>
 
diff --git a/boat-quay/boat-quay-rules/src/test/kotlin/com/backbase/oss/boat/quay/ruleset/util/TestUtil.kt b/boat-quay/boat-quay-rules/src/test/kotlin/com/backbase/oss/boat/quay/ruleset/util/TestUtil.kt
index d5afc3a2c..f801f0df7 100644
--- a/boat-quay/boat-quay-rules/src/test/kotlin/com/backbase/oss/boat/quay/ruleset/util/TestUtil.kt
+++ b/boat-quay/boat-quay-rules/src/test/kotlin/com/backbase/oss/boat/quay/ruleset/util/TestUtil.kt
@@ -32,7 +32,7 @@ fun openApiWithOperations(operations: Map<String, Iterable<String>>): OpenAPI =
                     responses.addApiResponse(it, ApiResponse())
                 }
             }
-            pathItem.operation(io.swagger.v3.oas.models.PathItem.HttpMethod.valueOf(method.toUpperCase()), operation)
+            pathItem.operation(io.swagger.v3.oas.models.PathItem.HttpMethod.valueOf(method.uppercase()), operation)
         }
         paths = Paths()
         paths.addPathItem("/test", pathItem)
diff --git a/boat-quay/pom.xml b/boat-quay/pom.xml
index e553626aa..4b0f0ecd4 100644
--- a/boat-quay/pom.xml
+++ b/boat-quay/pom.xml
@@ -19,7 +19,7 @@
     <properties>
         <sonar.coverage.jacoco.xmlReportPaths>${basedir}/../${aggregate.report.dir}
         </sonar.coverage.jacoco.xmlReportPaths>
-        <kotlin.version>2.0.21</kotlin.version>
+        <kotlin.version>2.1.20</kotlin.version>
         <kotlin.compiler.incremental>false</kotlin.compiler.incremental>
         <auto-service.version>1.1.1</auto-service.version>
     </properties>