diff --git a/gradle.properties b/gradle.properties
index dc95d89..0f3bb99 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -51,9 +51,7 @@ languageJava=21
 languageKotlin=2.0
 
 # Dependencies
-dependencyKotlinVersion=2.1.0
-dependencyKotlin_StdIdentifier=stdlib
-dependencyKotlin_StdLibIdentifier=stdlib-jdk21
+dependencyKotlinVersion=2.0.21
 dependencyKotlin_ReflectIdentifier=org.jetbrains.kotlin:kotlin-reflect
 dependencyKotlin_DateTimeIdentifier=org.jetbrains.kotlinx:kotlinx-datetime
 dependencyKotlin_DateTimeVersion=0.6.1