1.21.4 version

src/main/java/me/lukasabbe/bookshelfinspector/network/packets/ModCheckPayload.java

@@ -10,7 +10,7 @@ public record ModCheckPayload(boolean modActivated)  implements CustomPayload {
     public static final CustomPayload.Id<ModCheckPayload> ID = new CustomPayload.Id<>(BookShelfInspectorNetworkConstants.MOD_CHECK_PACKET_ID);
 
     public static final PacketCodec<RegistryByteBuf, ModCheckPayload> CODEC = PacketCodec.tuple(
-            PacketCodecs.BOOL, ModCheckPayload::modActivated,
+            PacketCodecs.BOOLEAN, ModCheckPayload::modActivated,
             ModCheckPayload::new
     );
 

src/main/resources/fabric.mod.json

@@ -25,7 +25,7 @@
   ],
   "depends": {
     "fabricloader": ">=${loader_version}",
-    "minecraft": ">=1.21.3",
+    "minecraft": ">=1.21.4-alpha.24.46.a",
     "fabric-api-base": "*",
     "fabric-networking-api-v1": "*",
     "fabric-lifecycle-events-v1": "*",