diff --git a/build.gradle.kts b/build.gradle.kts
index 5ab6e13..26c2610 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -177,7 +177,7 @@ allprojects {
         withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile::class) {
             with(kotlinOptions) {
                 freeCompilerArgs = listOf("-Xjvm-default=all", "-Xlambdas=indy", "-progressive")
-                jvmTarget = if (javaVer.toInt() < 10) "1.$javaVer" else javaVer
+                jvmTarget = if (javaVer.toInt() < 9) "1.$javaVer" else javaVer
                 languageVersion = (kotlinBaseVer.toDouble() + 0.1).toString()
                 apiVersion = kotlinBaseVer
             }