diff --git a/build.gradle.kts b/build.gradle.kts
index 7f5e7c9..3e0b662 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -4,7 +4,7 @@ plugins {
     `java-library`
     `maven-publish`
     id("com.github.hierynomus.license") version "0.16.1"
-    id("com.github.johnrengelman.shadow") version "8.1.0"
+    id("com.github.johnrengelman.shadow") version "8.1.1"
 }
 
 group = "me.clip"
@@ -24,9 +24,9 @@ repositories {
 
 dependencies {
     implementation("org.bstats:bstats-bukkit:3.0.1")
-    implementation("net.kyori:adventure-platform-bukkit:4.3.2")
+    implementation("net.kyori:adventure-platform-bukkit:4.3.3")
 
-    compileOnly("org.spigotmc:spigot-api:1.20-R0.1-SNAPSHOT")
+    compileOnly("org.spigotmc:spigot-api:1.21-R0.1-SNAPSHOT")
     compileOnlyApi("org.jetbrains:annotations:23.0.0")
 
     testImplementation("org.openjdk.jmh:jmh-core:1.32")
diff --git a/src/main/java/me/clip/placeholderapi/expansion/NMSVersion.java b/src/main/java/me/clip/placeholderapi/expansion/NMSVersion.java
index a730b5d..a9a8940 100644
--- a/src/main/java/me/clip/placeholderapi/expansion/NMSVersion.java
+++ b/src/main/java/me/clip/placeholderapi/expansion/NMSVersion.java
@@ -50,7 +50,8 @@ public enum NMSVersion {
   SPIGOT_1_20_R1("v1_20_R1"),
   SPIGOT_1_20_R2("v1_20_R2"),
   SPIGOT_1_20_R3("v1_20_R3"),
-  SPIGOT_1_20_R4("v1_20_R4");
+  SPIGOT_1_20_R4("v1_20_R4"),
+  SPIGOT_1_21_R1("v1_21_R1");
 
   private final String version;