diff --git a/spark-forge/build.gradle b/spark-forge/build.gradle
index 87948094..e4b2deb1 100644
--- a/spark-forge/build.gradle
+++ b/spark-forge/build.gradle
@@ -1,15 +1,15 @@
 plugins {
     id 'io.github.goooler.shadow' version '8.1.7'
-    id 'net.minecraftforge.gradle' version '[6.0,6.2)'
+    id 'net.minecraftforge.gradle' version '[6.0.24,6.2)'
 }
 
 tasks.withType(JavaCompile) {
-    // override, compile targeting J17
-    options.release = 17
+    // override, compile targeting J21
+    options.release = 21
 }
 
 minecraft {
-    mappings channel: 'official', version: '1.20.4'
+    mappings channel: 'official', version: '1.20.6'
     accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')
 }
 
@@ -19,7 +19,7 @@ configurations {
 }
 
 dependencies {
-    minecraft 'net.minecraftforge:forge:1.20.4-49.0.3'
+    minecraft 'net.minecraftforge:forge:1.20.6-50.0.6'
     shade project(':spark-common')
 }
 
diff --git a/spark-forge/src/main/java/me/lucko/spark/forge/ForgeCommandSender.java b/spark-forge/src/main/java/me/lucko/spark/forge/ForgeCommandSender.java
index 93536688..2b147656 100644
--- a/spark-forge/src/main/java/me/lucko/spark/forge/ForgeCommandSender.java
+++ b/spark-forge/src/main/java/me/lucko/spark/forge/ForgeCommandSender.java
@@ -26,6 +26,7 @@
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
 import net.minecraft.commands.CommandSource;
+import net.minecraft.core.RegistryAccess;
 import net.minecraft.network.chat.Component.Serializer;
 import net.minecraft.network.chat.MutableComponent;
 import net.minecraft.server.MinecraftServer;
@@ -66,7 +67,7 @@ public UUID getUniqueId() {
 
     @Override
     public void sendMessage(Component message) {
-        MutableComponent component = Serializer.fromJson(GsonComponentSerializer.gson().serializeToTree(message));
+        MutableComponent component = Serializer.fromJson(GsonComponentSerializer.gson().serializeToTree(message), RegistryAccess.EMPTY);
         Objects.requireNonNull(component, "component");
         super.delegate.sendSystemMessage(component);
     }