diff --git a/mppProjectWithSerialization.gradle b/mppProjectWithSerialization.gradle
index 82836b6..10a0637 100644
--- a/mppProjectWithSerialization.gradle
+++ b/mppProjectWithSerialization.gradle
@@ -47,4 +47,10 @@ kotlin {
     }
 }
 
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(8)
+    }
+}
+
 apply from: "$defaultAndroidSettingsPresetPath"