diff --git a/brut.apktool/apktool-cli/build.gradle b/brut.apktool/apktool-cli/build.gradle
index 80779c29..7f145c4a 100644
--- a/brut.apktool/apktool-cli/build.gradle
+++ b/brut.apktool/apktool-cli/build.gradle
@@ -44,10 +44,10 @@ task proguard(type: proguard.gradle.ProGuardTask, dependsOn: shadowJar) {
     injars shadowJar.getArchiveFile()
 
     // Java 9 and prior uses merged package for runtime, later uses split jmod files.
-    if (System.getProperty("java.version").startsWith('1.')) {
+    if (JavaVersion.current() <= JavaVersion.VERSION_1_8) {
         libraryjars "${System.properties['java.home']}/lib/rt.jar"
     } else {
-        libraryjars "${System.getProperty('java.home')}/jmods/java.base.jmod", jarfilter: '!**.jar', filter: '!module-info.class'
+        libraryjars "${System.properties['java.home']}/jmods/java.base.jmod", jarfilter: '!**.jar', filter: '!module-info.class'
     }
 
     dontobfuscate