1 files changed, 1 insertions, 0 deletions
diff --git a/build.gradle.kts b/build.gradle.kts
index 0ed23658..b4821208 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -54,6 +54,7 @@ subprojects {
         kotlinOptions {
             jvmTarget = "1.8"
             freeCompilerArgs = listOf("-Xopt-in=kotlin.RequiresOptIn")
+            languageVersion = "1.4"
         }
     }
 }