diff --git a/mppJavaProject.gradle b/mppJavaProject.gradle
index aa9cc2c..3543482 100644
--- a/mppJavaProject.gradle
+++ b/mppJavaProject.gradle
@@ -28,3 +28,9 @@ kotlin {
         }
     }
 }
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(8)
+    }
+}
diff --git a/mppProjectWithSerialization.gradle b/mppProjectWithSerialization.gradle
index 26e5929..a5d6875 100644
--- a/mppProjectWithSerialization.gradle
+++ b/mppProjectWithSerialization.gradle
@@ -49,4 +49,10 @@ kotlin {
     }
 }
 
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(8)
+    }
+}
+
 apply from: "$defaultAndroidSettingsPresetPath"