diff --git a/KotlinCore/build.gradle.kts b/KotlinCore/build.gradle.kts
index 88d6511c..6c16669c 100644
--- a/KotlinCore/build.gradle.kts
+++ b/KotlinCore/build.gradle.kts
@@ -59,7 +59,7 @@ sourceSets {
 dependencies {
     implementation(kotlin("reflect"))
 
-    compileOnly("org.spigotmc:spigot-api:1.20-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:1.21-R0.1-SNAPSHOT")
 }
 
 kotlin {
diff --git a/build.gradle.kts b/build.gradle.kts
index 2ff57269..6784aa86 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -56,13 +56,6 @@ allprojects {
     repositories {
         mavenCentral()
 
-        maven {
-            url = URI("https://repo.papermc.io/repository/maven-public/")
-            content {
-                includeGroup("com.velocitypowered")
-            }
-        }
-
         maven {
             url = URI("https://m2.dv8tion.net/releases")
             content {
@@ -109,6 +102,10 @@ allprojects {
         maven {
             url = URI("https://repo.viaversion.com")
         }
+
+        maven {
+            url = URI("https://repo.papermc.io/repository/maven-public/")
+        }
     }
 }
 
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 9315a3cf..cc7e386b 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -65,3 +65,5 @@ include("TutorialSystem")
 
 include("VelocityCore")
 include("VelocityCore:Persistent")
+
+include("KotlinCore")