diff --git a/src/main/java/com/comphenix/protocol/ProtocolLibrary.java b/src/main/java/com/comphenix/protocol/ProtocolLibrary.java
index 4f7d4b24..d107d346 100644
--- a/src/main/java/com/comphenix/protocol/ProtocolLibrary.java
+++ b/src/main/java/com/comphenix/protocol/ProtocolLibrary.java
@@ -35,12 +35,12 @@ public class ProtocolLibrary {
     /**
      * The maximum version ProtocolLib has been tested with.
      */
-    public static final String MAXIMUM_MINECRAFT_VERSION = "1.21.8";
+    public static final String MAXIMUM_MINECRAFT_VERSION = "1.21.11";
 
     /**
-     * The date (with ISO 8601 or YYYY-MM-DD) when the most recent version (1.21.8) was released.
+     * The date (with ISO 8601 or YYYY-MM-DD) when the most recent version (1.21.11) was released.
      */
-    public static final String MINECRAFT_LAST_RELEASE_DATE = "2025-07-17";
+    public static final String MINECRAFT_LAST_RELEASE_DATE = "2025-12-09";
 
     private static Plugin plugin;
     private static ProtocolConfig config;