diff --git a/build.gradle.kts b/build.gradle.kts
index 07a4a2cb..8c39b3f4 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -33,7 +33,7 @@ allprojects {
     }
 
     tasks.withType<KotlinCompile> {
-        kotlinOptions.freeCompilerArgs += listOf("-Xopt-in=kotlin.RequiresOptIn")
+        kotlinOptions.freeCompilerArgs += listOf("-opt-in=kotlin.RequiresOptIn")
     }
 
     tasks.withType<AbstractArchiveTask>().configureEach {