diff --git a/README.md b/README.md
index 35cc332..c838428 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Vomit [![Build Status](https://travis-ci.com/pascal541/Vomit.svg?branch=master)](https://travis-ci.com/pascal541/Vomit)
+# To view the updated code, switch over to the `latest` branch.
 
 ## Introduction:
 This is a simple minecraft bukkit plugin that lets players puke once they leave a minecart. There are a few things that you can configure (see config file). If you discover any bugs, errors or if you want a function to be added, please let me know.
diff --git a/pom.xml b/pom.xml
index 2e17ab1..9971395 100644
--- a/pom.xml
+++ b/pom.xml
@@ -61,7 +61,7 @@
         <dependency>
             <groupId>org.spigotmc</groupId>
             <artifactId>spigot-api</artifactId>
-            <version>1.15.1-R0.1-SNAPSHOT</version>
+            <version>1.21.4-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
diff --git a/src/main/java/me/gon_bao/vomit/VehicleExit.java b/src/main/java/me/gon_bao/vomit/VehicleExit.java
index 3aad313..3aafa38 100644
--- a/src/main/java/me/gon_bao/vomit/VehicleExit.java
+++ b/src/main/java/me/gon_bao/vomit/VehicleExit.java
@@ -28,8 +28,8 @@ public void onVehicleExit(VehicleExitEvent event) {
                     player.sendMessage(ChatColor.translateAlternateColorCodes('&', Main.message));
                 }
 
-                player.addPotionEffect(new PotionEffect(PotionEffectType.CONFUSION, ticks + 80, 0));
-                player.addPotionEffect(new PotionEffect(PotionEffectType.SLOW, ticks, 4));
+                player.addPotionEffect(new PotionEffect(PotionEffectType.NAUSEA, ticks + 80, 0));
+                player.addPotionEffect(new PotionEffect(PotionEffectType.SLOWNESS, ticks, 4));
 
                 VomitTimer.active.add(player);
             }
diff --git a/src/main/java/me/gon_bao/vomit/VomitTimer.java b/src/main/java/me/gon_bao/vomit/VomitTimer.java
index 2850400..ec17928 100644
--- a/src/main/java/me/gon_bao/vomit/VomitTimer.java
+++ b/src/main/java/me/gon_bao/vomit/VomitTimer.java
@@ -13,7 +13,7 @@
 class VomitTimer {
 
     static ArrayList<Player> active = new ArrayList<>();
-    private static HashMap<Player, Integer> ticks = new HashMap<>();
+    private static final HashMap<Player, Integer> ticks = new HashMap<>();
 
     static void startTimer() {
         Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask(Main.getPlugin(), () -> {
@@ -38,7 +38,7 @@ static void startTimer() {
                 }
                 Location playerLocation = player.getLocation();
                 Location spawnParticleLocation = new Location(playerLocation.getWorld(), playerLocation.getX(), playerLocation.getY() + 1.5, playerLocation.getZ());
-                player.getWorld().spawnParticle(Particle.SLIME, spawnParticleLocation, 50);
+                player.getWorld().spawnParticle(Particle.ITEM_SLIME, spawnParticleLocation, 50);
             }
         }, 0, 0);
     }