diff --git a/helper/pom.xml b/helper/pom.xml
index ae8e9001..1dee6a72 100644
--- a/helper/pom.xml
+++ b/helper/pom.xml
@@ -12,7 +12,7 @@
 
     <artifactId>helper</artifactId>
     <packaging>jar</packaging>
-    <version>5.6.14</version>
+    <version>5.6.17</version>
 
     <name>helper</name>
     <description>A utility to reduce boilerplate code in Bukkit plugins.</description>
@@ -163,7 +163,7 @@
         <dependency>
             <groupId>me.lucko</groupId>
             <artifactId>shadow-bukkit</artifactId>
-            <version>1.20.1</version>
+            <version>1.21.4</version>
             <scope>compile</scope>
         </dependency>
         <!-- flowpowered math -->
diff --git a/helper/src/main/java/me/lucko/helper/reflect/MinecraftVersion.java b/helper/src/main/java/me/lucko/helper/reflect/MinecraftVersion.java
index cbf041e5..3bbe8f1e 100644
--- a/helper/src/main/java/me/lucko/helper/reflect/MinecraftVersion.java
+++ b/helper/src/main/java/me/lucko/helper/reflect/MinecraftVersion.java
@@ -50,12 +50,12 @@ public final class MinecraftVersion implements Comparable<MinecraftVersion> {
     /**
      * The newest known version of Minecraft
      */
-    private static final String NEWEST_MINECRAFT_VERSION = "1.20.1";
+    private static final String NEWEST_MINECRAFT_VERSION = "1.21.4";
 
     /**
      * The date (with ISO 8601 or YYYY-MM-DD) when the most recent version was released.
      */
-    private static final String MINECRAFT_LAST_RELEASE_DATE = "2023-06-07";
+    private static final String MINECRAFT_LAST_RELEASE_DATE = "2024-12-03";
 
     /**
      * Gets the {@link MinecraftVersion} of the runtime server.
diff --git a/helper/src/main/java/me/lucko/helper/reflect/MinecraftVersions.java b/helper/src/main/java/me/lucko/helper/reflect/MinecraftVersions.java
index 76191a45..85933d28 100644
--- a/helper/src/main/java/me/lucko/helper/reflect/MinecraftVersions.java
+++ b/helper/src/main/java/me/lucko/helper/reflect/MinecraftVersions.java
@@ -37,6 +37,10 @@
  */
 public final class MinecraftVersions {
 
+    /**
+     * Version 1.21 - the tricky trials update
+     */
+    public static final MinecraftVersion v1_21 = MinecraftVersion.parse("1.21");
     /**
      * Version 1.20 - the trails and tails update
      */
diff --git a/helper/src/main/java/me/lucko/helper/reflect/NmsVersion.java b/helper/src/main/java/me/lucko/helper/reflect/NmsVersion.java
index 07a51bd1..46042da3 100644
--- a/helper/src/main/java/me/lucko/helper/reflect/NmsVersion.java
+++ b/helper/src/main/java/me/lucko/helper/reflect/NmsVersion.java
@@ -125,6 +125,29 @@ protected String getPackageComponent() {
             MinecraftVersion.of(1, 19, 0),
             MinecraftVersion.of(1, 19, 1),
             MinecraftVersion.of(1, 19, 2)
+    ),
+    v1_20_R1(
+            MinecraftVersion.of(1, 20, 0),
+            MinecraftVersion.of(1, 20, 1)
+    ),
+    v1_20_R2(
+            MinecraftVersion.of(1, 20, 2)
+    ),
+    v1_20_R3(
+            MinecraftVersion.of(1, 20, 3),
+            MinecraftVersion.of(1, 20, 4)
+    ),
+    v1_20_R4(
+            MinecraftVersion.of(1, 20, 5),
+            MinecraftVersion.of(1, 20, 6)
+    ),
+    v1_21_R1(
+            MinecraftVersion.of(1, 21, 0),
+            MinecraftVersion.of(1, 21, 1)
+    ),
+    v1_21_R2(
+            MinecraftVersion.of(1, 21, 2),
+            MinecraftVersion.of(1, 21, 3)
     );
 
     private final Set<MinecraftVersion> minecraftVersions;