diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20to1_19_4/Protocol1_20To1_19_4.java b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20to1_19_4/Protocol1_20To1_19_4.java
index 9daa8576..80fb1db3 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20to1_19_4/Protocol1_20To1_19_4.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_20to1_19_4/Protocol1_20To1_19_4.java
@@ -34,7 +34,7 @@ import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.packet.ServerboundPac
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
-import java.util.Arrays;
+import com.viaversion.viaversion.util.ArrayUtil;
 
 public final class Protocol1_20To1_19_4 extends BackwardsProtocol<ClientboundPackets1_19_4, ClientboundPackets1_19_4, ServerboundPackets1_19_4, ServerboundPackets1_19_4> {
 
@@ -75,10 +75,7 @@ public final class Protocol1_20To1_19_4 extends BackwardsProtocol<ClientboundPac
 
         registerClientbound(ClientboundPackets1_19_4.UPDATE_ENABLED_FEATURES, wrapper -> {
             String[] enabledFeatures = wrapper.read(Types.STRING_ARRAY);
-            final int length = enabledFeatures.length;
-            enabledFeatures = Arrays.copyOf(enabledFeatures, length + 1);
-            enabledFeatures[length] = "minecraft:update_1_20";
-            wrapper.write(Types.STRING_ARRAY, enabledFeatures);
+            wrapper.write(Types.STRING_ARRAY, ArrayUtil.add(enabledFeatures, "minecraft:update_1_20"));
         });
 
         registerClientbound(ClientboundPackets1_19_4.PLAYER_COMBAT_END, wrapper -> {
diff --git a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_21to1_20_5/Protocol1_21To1_20_5.java b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_21to1_20_5/Protocol1_21To1_20_5.java
index 87248a46..846490f6 100644
--- a/common/src/main/java/com/viaversion/viabackwards/protocol/v1_21to1_20_5/Protocol1_21To1_20_5.java
+++ b/common/src/main/java/com/viaversion/viabackwards/protocol/v1_21to1_20_5/Protocol1_21To1_20_5.java
@@ -45,6 +45,7 @@ import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPacke
 import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPackets1_21;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
+import com.viaversion.viaversion.util.ArrayUtil;
 
 import static com.viaversion.viaversion.util.ProtocolUtil.packetTypeMap;
 
@@ -174,6 +175,11 @@ public final class Protocol1_21To1_20_5 extends BackwardsProtocol<ClientboundPac
                 wrapper.set(Types.VAR_INT, 1, newSize);
             }
         });
+
+        registerClientbound(ClientboundConfigurationPackets1_21.UPDATE_ENABLED_FEATURES, wrapper -> {
+            final String[] enabledFeatures = wrapper.read(Types.STRING_ARRAY);
+            wrapper.write(Types.STRING_ARRAY, ArrayUtil.add(enabledFeatures, "minecraft:update_1_21"));
+        });
     }
 
     @Override
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 3a485976..561d4c90 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -3,7 +3,7 @@ metadata.format.version = "1.1"
 [versions]
 
 # ViaVersion
-viaver = "5.0.0"
+viaver = "5.0.1-SNAPSHOT"
 
 # Common provided
 netty = "4.0.20.Final"