diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e6c93842..bc3588aa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
       - uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: '17'
+          java-version: '21'
 
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v2
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index d64cd491..e6441136 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a80b22ce..b82aa23a 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/spark-fabric/build.gradle b/spark-fabric/build.gradle
index 6ebb4733..5ab88ee0 100644
--- a/spark-fabric/build.gradle
+++ b/spark-fabric/build.gradle
@@ -6,8 +6,8 @@ plugins {
 }
 
 tasks.withType(JavaCompile) {
-    // override, compile targeting J17
-    options.release = 17
+    // override, compile targeting J21
+    options.release = 21
 }
 
 repositories {
@@ -28,9 +28,9 @@ configurations {
 
 dependencies {
     // https://modmuss50.me/fabric.html
-    minecraft 'com.mojang:minecraft:1.20.4'
-    mappings 'net.fabricmc:yarn:1.20.4+build.1:v2'
-    modImplementation 'net.fabricmc:fabric-loader:0.15.1'
+    minecraft 'com.mojang:minecraft:1.20.5'
+    mappings 'net.fabricmc:yarn:1.20.5+build.1:v2'
+    modImplementation 'net.fabricmc:fabric-loader:0.15.10'
 
     Set<String> apiModules = [
             "fabric-api-base",
@@ -40,12 +40,12 @@ dependencies {
 
     // Add each module as a dependency
     apiModules.forEach {
-        modImplementation(fabricApi.module(it, '0.91.2+1.20.4'))
+        modImplementation(fabricApi.module(it, '0.97.5+1.20.5'))
     }
 
     include(modImplementation('me.lucko:fabric-permissions-api:0.3.1'))
 
-    modImplementation('eu.pb4:placeholder-api:2.0.0-beta.4+1.19')
+    modImplementation('eu.pb4:placeholder-api:2.4.0-pre.1+1.20.5')
 
     shade project(':spark-common')
 }
diff --git a/spark-fabric/src/main/java/me/lucko/spark/fabric/FabricCommandSender.java b/spark-fabric/src/main/java/me/lucko/spark/fabric/FabricCommandSender.java
index ca7b8939..7da89966 100644
--- a/spark-fabric/src/main/java/me/lucko/spark/fabric/FabricCommandSender.java
+++ b/spark-fabric/src/main/java/me/lucko/spark/fabric/FabricCommandSender.java
@@ -26,6 +26,7 @@
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.registry.DynamicRegistryManager;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.command.CommandOutput;
 import net.minecraft.server.rcon.RconCommandOutput;
@@ -64,7 +65,7 @@ public UUID getUniqueId() {
 
     @Override
     public void sendMessage(Component message) {
-        Text component = Text.Serialization.fromJsonTree(GsonComponentSerializer.gson().serializeToTree(message));
+        Text component = Text.Serialization.fromJsonTree(GsonComponentSerializer.gson().serializeToTree(message), DynamicRegistryManager.EMPTY);
         super.delegate.sendMessage(component);
     }
 
diff --git a/spark-fabric/src/main/java/me/lucko/spark/fabric/FabricExtraMetadataProvider.java b/spark-fabric/src/main/java/me/lucko/spark/fabric/FabricExtraMetadataProvider.java
index 22794c27..91797bb4 100644
--- a/spark-fabric/src/main/java/me/lucko/spark/fabric/FabricExtraMetadataProvider.java
+++ b/spark-fabric/src/main/java/me/lucko/spark/fabric/FabricExtraMetadataProvider.java
@@ -54,7 +54,7 @@ private JsonElement datapackMetadata() {
             obj.addProperty("name", profile.getDisplayName().getString());
             obj.addProperty("description", profile.getDescription().getString());
             obj.addProperty("source", resourcePackSource(profile.getSource()));
-            datapacks.add(profile.getName(), obj);
+            datapacks.add(profile.getId(), obj);
         }
         return datapacks;
     }
diff --git a/spark-fabric/src/main/java/me/lucko/spark/fabric/placeholder/SparkFabricPlaceholderApi.java b/spark-fabric/src/main/java/me/lucko/spark/fabric/placeholder/SparkFabricPlaceholderApi.java
index dc95bf41..dc4321da 100644
--- a/spark-fabric/src/main/java/me/lucko/spark/fabric/placeholder/SparkFabricPlaceholderApi.java
+++ b/spark-fabric/src/main/java/me/lucko/spark/fabric/placeholder/SparkFabricPlaceholderApi.java
@@ -30,6 +30,7 @@
 
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+import net.minecraft.registry.DynamicRegistryManager;
 import net.minecraft.text.Text;
 import net.minecraft.util.Identifier;
 
@@ -60,7 +61,7 @@ private static PlaceholderResult toResult(Component component) {
         }
 
         private static Text toText(Component component) {
-            return Text.Serialization.fromJsonTree(GsonComponentSerializer.gson().serializeToTree(component));
+            return Text.Serialization.fromJsonTree(GsonComponentSerializer.gson().serializeToTree(component), DynamicRegistryManager.EMPTY);
         }
     }
 
diff --git a/spark-fabric/src/main/resources/spark.mixins.json b/spark-fabric/src/main/resources/spark.mixins.json
index beaca2f5..27676a64 100644
--- a/spark-fabric/src/main/resources/spark.mixins.json
+++ b/spark-fabric/src/main/resources/spark.mixins.json
@@ -1,7 +1,6 @@
 {
   "required": true,
   "package": "me.lucko.spark.fabric.mixin",
-  "compatibilityLevel": "JAVA_17",
   "client": [
     "ClientEntityManagerAccessor",
     "ClientWorldAccessor",