diff --git a/build.gradle b/build.gradle
index 889d4f4..319c67c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -26,7 +26,7 @@ base {
     archivesName = 'inventorysorter'
 }
 
-java.toolchain.languageVersion = JavaLanguageVersion.of(21)
+java.toolchain.languageVersion = JavaLanguageVersion.of(17)
 
 //minecraft.accessTransformers.file rootProject.file('src/main/resources/META-INF/accesstransformer.cfg')
 //minecraft.accessTransformers.entry public net.minecraft.client.Minecraft textureManager # textureManager