Added another extra.

build.gradle

@@ -41,6 +41,7 @@ repositories {
         name = "CodeMC"
         url = uri("https://repo.codemc.io/repository/maven-public/")
     }
+    maven { url 'https://jitpack.io' }
 }
 
 dependencies {
@@ -49,7 +50,8 @@ dependencies {
     compileOnly "io.papermc.paper:paper-api:1.21.4-R0.1-SNAPSHOT"
     implementation 'com.google.code.gson:gson:2.10.1'
     implementation 'org.ow2.asm:asm-commons:9.5'
-    implementation files("deps/PDK-1.4.0.jar")
+    implementation files("libs/PDK-1.4.0.jar")
+    compileOnly 'com.github.koca2000:NoteBlockAPI:1.6.3'
     implementation "com.github.retrooper:packetevents-spigot:2.7.0"
     implementation("de.tr7zw:item-nbt-api:2.14.1")
 }