diff --git a/build.gradle b/build.gradle
index 2e53e9a..b8c7e07 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,6 +12,7 @@ archivesBaseName = "LibAC"
 
 
 java {
+    sourceCompatibility = JavaLanguageVersion.of(8)
     toolchain.languageVersion = JavaLanguageVersion.of(8)
     withSourcesJar()
     withJavadocJar()