diff --git a/build.gradle.kts b/build.gradle.kts
index b32ebab..92adece 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -180,7 +180,10 @@ allprojects {
     tasks {
         withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile::class) {
             with(kotlinOptions) {
-                freeCompilerArgs = listOf("-Xjvm-default=all", "-Xlambdas=indy", "-Xopt-in=kotlin.RequiresOptIn", "-progressive")
+                freeCompilerArgs = listOf(
+                    "-Xjvm-default=all", "-Xlambdas=indy",
+                    "-Xopt-in=kotlin.RequiresOptIn", "-Xextended-compiler-checks", "-progressive"
+                )
                 jvmTarget = if (javaVer.toInt() < 9) "1.$javaVer" else javaVer
                 languageVersion = (kotlinBaseVer.toDouble() + 0.1).toString()
                 apiVersion = kotlinBaseVer