diff --git a/build.gradle.kts b/build.gradle.kts
index 0e8c063..dc53e61 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -3,17 +3,11 @@ plugins {
 }
 
 group = "com.alttd"
-version = "1.0.0-SNAPSHOT"
+version = System.getenv("BUILD_NUMBER") ?: "1.0.0-SNAPSHOT"
 description = "Blacklist anyone with a specific permission from a world."
 
 apply<JavaLibraryPlugin>()
 
-java {
-    toolchain {
-        languageVersion.set(JavaLanguageVersion.of(21))
-    }
-}
-
 tasks {
     withType<JavaCompile> {
         options.encoding = Charsets.UTF_8.name()