diff --git a/reposilite-backend/build.gradle.kts b/reposilite-backend/build.gradle.kts
index 76337e7fa..af2b69183 100644
--- a/reposilite-backend/build.gradle.kts
+++ b/reposilite-backend/build.gradle.kts
@@ -39,7 +39,7 @@ dependencies {
     val detekt = "1.23.0"
     detektPlugins("io.gitlab.arturbosch.detekt:detekt-formatting:$detekt")
 
-    val kotlin = "1.9.20"
+    val kotlin = "1.9.21"
     implementation("org.jetbrains.kotlin:kotlin-reflect:$kotlin")
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin")