diff --git a/build.gradle.kts b/build.gradle.kts
index 5617c3c..6b8dc59 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -12,7 +12,7 @@ apply<JavaLibraryPlugin>()
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(17))
+        languageVersion.set(JavaLanguageVersion.of(21))
     }
 }
 
@@ -43,7 +43,7 @@ tasks {
 }
 
 dependencies {
-    compileOnly("com.alttd:Galaxy-API:1.20.4-R0.1-SNAPSHOT") {
+    compileOnly("com.alttd:Galaxy-API:1.21-R0.1-SNAPSHOT") {
         isChanging = true
     }
 }
\ No newline at end of file