diff --git a/build.gradle b/build.gradle
index d3f6a69..8a30b77 100644
--- a/build.gradle
+++ b/build.gradle
@@ -15,11 +15,13 @@ repositories {
     }
 }
 
-dependencies {
-    compile 'com.destroystokyo.paper:paper-api:1.16.5-R0.1-SNAPSHOT'
+sourceCompatibility = JavaVersion.VERSION_16
+targetCompatibility = JavaVersion.VERSION_16
 
+dependencies {
+    compileOnly 'io.papermc.paper:paper-api:1.17.1-R0.1-SNAPSHOT'
 }
 
 test {
     useJUnitPlatform()
-}
\ No newline at end of file
+}
diff --git a/src/main/java/io/egg/tickspeed/TickTimeJob.java b/src/main/java/io/egg/tickspeed/TickTimeJob.java
index 06b0d27..b971ec4 100644
--- a/src/main/java/io/egg/tickspeed/TickTimeJob.java
+++ b/src/main/java/io/egg/tickspeed/TickTimeJob.java
@@ -1,6 +1,5 @@
 package io.egg.tickspeed;
 
-
 import org.bukkit.Bukkit;
 
 import java.lang.reflect.Field;
@@ -18,9 +17,9 @@ public TickTimeJob() {
         try {
             utils = getNmsClass("SystemUtils");
             getMillis = utils.getDeclaredMethod("getMonotonicMillis");
-            server = getNmsClass("MinecraftServer");
+            server = getNmsClass("server.MinecraftServer");
             getServer = server.getMethod("getServer");
-            f = server.getDeclaredField("nextTick");
+            f = server.getDeclaredField("ao");
         } catch (ClassNotFoundException | NoSuchMethodException | NoSuchFieldException e) {
             e.printStackTrace();
         }
@@ -51,14 +50,8 @@ public void run() {
         }
     }
     public Class<?> getNmsClass(String name) throws ClassNotFoundException {
-        // explode the Server interface implementation's package name into its components
-        String[] array = Bukkit.getServer().getClass().getPackage().getName().split("\\.");
-
-        // pick out the component representing the package version if it's present
-        String packageVersion = array.length == 4 ? array[3] + "." : "";
-
         // construct the qualified class name from the obtained package version
-        String qualName = "net.minecraft.server." + packageVersion + name;
+        String qualName = "net.minecraft." + name;
 
         // simple call to get the Class object
         return Class.forName(qualName);