diff --git a/gradle.properties b/gradle.properties
index 4aa5f43..93b785f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,6 +3,6 @@ org.gradle.jvmargs=-Xmx1G
 
 # Your project's version
 group=gay.ampflower
-projectVersion=0.4.7
+projectVersion=0.4.8
 modrinthId=z23qey0b
-minecraftCompatible=1.20.6
+minecraftCompatible=1.21
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index b6f2ebe..0e8e530 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -2,14 +2,14 @@
 annotations = "23.0.0"
 
 # https://github.com/LambdAurora/SpruceUI
-spruceui = "5.1.0+1.20.6"
-modmenu = "10.0.+"
+spruceui = "5.1.0+1.21"
+modmenu = "11.0.+"
 
 # Minecraft
-minecraft_version = "1.20.6"
-minecraft_required = "1.20.6"
+minecraft_version = "1.21"
+minecraft_required = "1.21"
 fabric_loader = "0.15.+"
-fabric_api = "0.100.4+1.20.6"
+fabric_api = "0.100.4+1.21"
 
 # Plugins
 loom = "1.+"
diff --git a/src/main/java/gay/ampflower/musicmoods/Constants.java b/src/main/java/gay/ampflower/musicmoods/Constants.java
index 90b45fa..5273448 100644
--- a/src/main/java/gay/ampflower/musicmoods/Constants.java
+++ b/src/main/java/gay/ampflower/musicmoods/Constants.java
@@ -35,6 +35,6 @@ public static WidgetSprites widgetHoverable(String widget) {
 	}
 
 	public static ResourceLocation widget(String widget) {
-		return new ResourceLocation(modId, "widget/" + widget);
+		return ResourceLocation.fromNamespaceAndPath(modId, "widget/" + widget);
 	}
 }
diff --git a/src/main/java/gay/ampflower/musicmoods/client/MusicSoundInstance.java b/src/main/java/gay/ampflower/musicmoods/client/MusicSoundInstance.java
index 82dc22b..cd17c69 100644
--- a/src/main/java/gay/ampflower/musicmoods/client/MusicSoundInstance.java
+++ b/src/main/java/gay/ampflower/musicmoods/client/MusicSoundInstance.java
@@ -7,7 +7,7 @@
 package gay.ampflower.musicmoods.client;// Created 2023-09-01T02:55:14
 
 import it.unimi.dsi.fastutil.floats.FloatUnaryOperator;
-import net.minecraft.client.Timer;
+import net.minecraft.client.DeltaTracker;
 import net.minecraft.client.resources.sounds.AbstractTickableSoundInstance;
 import net.minecraft.client.resources.sounds.SoundInstance;
 import net.minecraft.sounds.SoundEvent;
@@ -25,7 +25,7 @@ public class MusicSoundInstance extends AbstractTickableSoundInstance {
 	 */
 	private static final float JUMP_LIMIT = 0.025F;
 
-	private final Timer timer = new Timer(20F, System.currentTimeMillis(), FloatUnaryOperator.identity());
+	private final DeltaTracker.Timer timer = new DeltaTracker.Timer(20F, System.currentTimeMillis(), FloatUnaryOperator.identity());
 	private float fadeOut;
 	private float fadeIn;
 
@@ -66,10 +66,10 @@ public void setFadeIn(float fadeIn) {
 
 	@Override
 	public void tick() {
-		this.timer.advanceTime(System.currentTimeMillis());
+		this.timer.advanceTime(System.currentTimeMillis(), false);
 
 		if (fadeOut > 0F && this.volume > 0F) {
-			final var newVolume = Math.max(this.volume - Math.min(this.timer.tickDelta / fadeOut, JUMP_LIMIT), 0F);
+			final var newVolume = Math.max(this.volume - Math.min(this.timer.getRealtimeDeltaTicks() / fadeOut, JUMP_LIMIT), 0F);
 
 			if (newVolume == newVolume) {
 				this.volume = newVolume;
@@ -77,7 +77,7 @@ public void tick() {
 		}
 
 		if (fadeIn > 0F && this.volume < 1F) {
-			final var newVolume = Math.min(this.volume + Math.min(this.timer.tickDelta / fadeIn, JUMP_LIMIT), 1F);
+			final var newVolume = Math.min(this.volume + Math.min(this.timer.getRealtimeDeltaTicks() / fadeIn, JUMP_LIMIT), 1F);
 
 			if (newVolume == newVolume) {
 				this.volume = newVolume;