diff --git a/bundle/src/main/java/net/okocraft/box/platform/PatcherFactories.java b/bundle/src/main/java/net/okocraft/box/platform/PatcherFactories.java
index f21d5ac4de..d230096523 100644
--- a/bundle/src/main/java/net/okocraft/box/platform/PatcherFactories.java
+++ b/bundle/src/main/java/net/okocraft/box/platform/PatcherFactories.java
@@ -6,27 +6,20 @@
 import net.okocraft.box.version.common.item.LegacyVersionPatches;
 import org.jetbrains.annotations.NotNull;
 
-import static net.okocraft.box.api.util.MCDataVersion.MC_1_19;
-import static net.okocraft.box.api.util.MCDataVersion.MC_1_19_4;
-import static net.okocraft.box.api.util.MCDataVersion.MC_1_20_3;
-import static net.okocraft.box.api.util.MCDataVersion.MC_1_20_4;
-
 final class PatcherFactories {
 
     static @NotNull ItemNamePatcher createItemNamePatcher(@NotNull ItemVersion startingVersion, @NotNull ItemVersion currentVersion) {
         var builder = new ItemNamePatcherBuilder();
-        var dataVer = startingVersion.dataVersion();
-        var itemVer = startingVersion.defaultItemVersion();
 
-        if (dataVer.isBetween(MC_1_19, MC_1_19_4) && itemVer == 0) {
+        if (LegacyVersionPatches.shouldPatchGoatHorn(startingVersion)) {
             builder.append(LegacyVersionPatches::goatHornName);
         }
 
-        if (dataVer.isBefore(MC_1_20_3) && currentVersion.dataVersion().isAfterOrSame(MC_1_20_3)) {
+        if (LegacyVersionPatches.shouldPatchShortGrassName(startingVersion, currentVersion)) {
             builder.append(LegacyVersionPatches::shortGrassName);
         }
 
-        if (dataVer.isBefore(MC_1_20_4) && currentVersion.dataVersion().isAfterOrSame(MC_1_20_4)) { // TODO: back to MC_1_21 after Minecraft 1.21 released
+        if (true || LegacyVersionPatches.shouldPatchPotionName(startingVersion, currentVersion)) { // TODO: fix this after Minecraft 1.20.5 released
             builder.append(LegacyVersionPatches::potionName);
         }
 
@@ -35,10 +28,8 @@ final class PatcherFactories {
 
     static @NotNull ItemDataPatcher createItemDataPatcher(@NotNull ItemVersion startingVersion, @NotNull ItemVersion ignoredCurrentVersion) {
         var builder = new ItemDataPatcherBuilder();
-        var dataVer = startingVersion.dataVersion();
-        var itemVer = startingVersion.defaultItemVersion();
 
-        if (dataVer.isBetween(MC_1_19, MC_1_19_4) && itemVer == 0) {
+        if (LegacyVersionPatches.shouldPatchGoatHorn(startingVersion)) {
             builder.append(LegacyVersionPatches::goatHorn);
         }
 
diff --git a/bundle/src/main/java/net/okocraft/box/platform/PlatformDependent.java b/bundle/src/main/java/net/okocraft/box/platform/PlatformDependent.java
index 4789fad651..aadb8b7164 100644
--- a/bundle/src/main/java/net/okocraft/box/platform/PlatformDependent.java
+++ b/bundle/src/main/java/net/okocraft/box/platform/PlatformDependent.java
@@ -1,18 +1,18 @@
 package net.okocraft.box.platform;
 
+import net.okocraft.box.api.model.item.ItemVersion;
 import net.okocraft.box.api.scheduler.BoxScheduler;
 import net.okocraft.box.api.util.Folia;
 import net.okocraft.box.api.util.MCDataVersion;
 import net.okocraft.box.core.command.CommandRegisterer;
 import net.okocraft.box.storage.api.util.item.DefaultItem;
 import net.okocraft.box.storage.api.util.item.DefaultItemProvider;
-import net.okocraft.box.api.model.item.ItemVersion;
 import net.okocraft.box.storage.api.util.item.patcher.ItemDataPatcher;
 import net.okocraft.box.storage.api.util.item.patcher.ItemNamePatcher;
 import net.okocraft.box.storage.api.util.item.patcher.PatcherFactory;
 import net.okocraft.box.version.common.command.BukkitCommandRegisterer;
 import net.okocraft.box.version.common.scheduler.FoliaSchedulerWrapper;
-import net.okocraft.box.version.paper_1_21.Paper_1_21;
+import net.okocraft.box.version.paper_1_20_5.Paper_1_20_5;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.Plugin;
 import org.jetbrains.annotations.NotNull;
@@ -22,6 +22,8 @@
 
 public final class PlatformDependent {
 
+    private static final ItemVersion TESTING_VERSION = new ItemVersion(MCDataVersion.MC_1_20_4, 1); // TODO: remove this after Minecraft 1.20.5 released
+
     public static @NotNull BoxScheduler createScheduler(@NotNull Plugin plugin) throws NotSupportedException {
         if (Folia.check() || MCDataVersion.current().isAfterOrSame(MCDataVersion.MC_1_20)) {
             return new FoliaSchedulerWrapper(plugin);
@@ -31,9 +33,14 @@ public final class PlatformDependent {
     }
 
     public static @NotNull DefaultItemProvider createItemProvider() throws NotSupportedException {
-        if (MCDataVersion.current().isAfterOrSame(MCDataVersion.MC_1_20_4)) { // TODO: back to MC_1_21 after Minecraft 1.21 released
-            return new DefaultItemProviderImpl(new ItemVersion(MCDataVersion.MC_1_20_4, 0), Paper_1_21::defaultItems);
+        if (MCDataVersion.current().isSame(TESTING_VERSION.dataVersion())) {
+            return new DefaultItemProviderImpl(TESTING_VERSION, Paper_1_20_5::defaultItems);
         }
+
+        if (MCDataVersion.current().isSame(MCDataVersion.MC_1_20_5)) {
+            return new DefaultItemProviderImpl(Paper_1_20_5.VERSION, Paper_1_20_5::defaultItems);
+        }
+
         throw new NotSupportedException("Unsupported version: " + Bukkit.getVersion());
     }
 
diff --git a/settings.gradle.kts b/settings.gradle.kts
index a288bdcf6f..65a20b1ef3 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -53,7 +53,7 @@ val versionSuffix = "version"
 // versions
 sequenceOf(
     "common",
-    "paper-1_21"
+    "paper-1_20_5"
 ).forEach {
     include("$boxPrefix-$versionSuffix-$it")
     project(":$boxPrefix-$versionSuffix-$it").projectDir = file("./versions/$it")
diff --git a/versions/common/src/main/java/net/okocraft/box/version/common/item/LegacyVersionPatches.java b/versions/common/src/main/java/net/okocraft/box/version/common/item/LegacyVersionPatches.java
index 0c0f1c7280..7505d90251 100644
--- a/versions/common/src/main/java/net/okocraft/box/version/common/item/LegacyVersionPatches.java
+++ b/versions/common/src/main/java/net/okocraft/box/version/common/item/LegacyVersionPatches.java
@@ -1,5 +1,6 @@
 package net.okocraft.box.version.common.item;
 
+import net.okocraft.box.api.model.item.ItemVersion;
 import net.okocraft.box.storage.api.model.item.ItemData;
 import org.bukkit.Material;
 import org.bukkit.MusicInstrument;
@@ -7,16 +8,33 @@
 import org.bukkit.inventory.meta.MusicInstrumentMeta;
 import org.jetbrains.annotations.NotNull;
 
+import static net.okocraft.box.api.util.MCDataVersion.MC_1_19;
+import static net.okocraft.box.api.util.MCDataVersion.MC_1_19_4;
+import static net.okocraft.box.api.util.MCDataVersion.MC_1_20_3;
+import static net.okocraft.box.api.util.MCDataVersion.MC_1_20_5;
+
 public final class LegacyVersionPatches {
 
+    public static boolean shouldPatchGoatHorn(@NotNull ItemVersion version) {
+        return version.dataVersion().isBetween(MC_1_19, MC_1_19_4) && version.defaultItemVersion() == 0;
+    }
+
     public static @NotNull String goatHornName(@NotNull String original) {
         return original.equals("GOAT_HORN") ? "PONDER_GOAT_HORN" : original;
     }
 
+    public static boolean shouldPatchShortGrassName(@NotNull ItemVersion starting, @NotNull ItemVersion current) {
+        return starting.dataVersion().isBefore(MC_1_20_3) && current.dataVersion().isAfterOrSame(MC_1_20_3);
+    }
+
     public static @NotNull String shortGrassName(@NotNull String original) {
         return original.equals("GRASS") ? "SHORT_GRASS" : original;
     }
 
+    public static boolean shouldPatchPotionName(@NotNull ItemVersion starting, @NotNull ItemVersion current) {
+        return starting.dataVersion().isBefore(MC_1_20_5) && current.dataVersion().isAfterOrSame(MC_1_20_5);
+    }
+
     public static @NotNull String potionName(@NotNull String original) {
         String material;
         String potionType;
diff --git a/versions/paper-1_21/build.gradle.kts b/versions/paper-1_20_5/build.gradle.kts
similarity index 100%
rename from versions/paper-1_21/build.gradle.kts
rename to versions/paper-1_20_5/build.gradle.kts
diff --git a/versions/paper-1_21/src/main/java/net/okocraft/box/version/paper_1_21/Paper_1_21.java b/versions/paper-1_20_5/src/main/java/net/okocraft/box/version/paper_1_20_5/Paper_1_20_5.java
similarity index 75%
rename from versions/paper-1_21/src/main/java/net/okocraft/box/version/paper_1_21/Paper_1_21.java
rename to versions/paper-1_20_5/src/main/java/net/okocraft/box/version/paper_1_20_5/Paper_1_20_5.java
index 6f1f434ef0..ea7af82875 100644
--- a/versions/paper-1_21/src/main/java/net/okocraft/box/version/paper_1_21/Paper_1_21.java
+++ b/versions/paper-1_20_5/src/main/java/net/okocraft/box/version/paper_1_20_5/Paper_1_20_5.java
@@ -1,5 +1,7 @@
-package net.okocraft.box.version.paper_1_21;
+package net.okocraft.box.version.paper_1_20_5;
 
+import net.okocraft.box.api.model.item.ItemVersion;
+import net.okocraft.box.api.util.MCDataVersion;
 import net.okocraft.box.storage.api.util.item.DefaultItem;
 import net.okocraft.box.version.common.item.ItemSources;
 import org.bukkit.Bukkit;
@@ -7,7 +9,9 @@
 
 import java.util.stream.Stream;
 
-public final class Paper_1_21 {
+public final class Paper_1_20_5 {
+
+    public static final ItemVersion VERSION = new ItemVersion(MCDataVersion.MC_1_20_5, 0);
 
     public static @NotNull Stream<DefaultItem> defaultItems() {
         return new ItemSources.Merger()
@@ -24,7 +28,7 @@ public final class Paper_1_21 {
                 .result();
     }
 
-    private Paper_1_21() {
+    private Paper_1_20_5() {
         throw new UnsupportedOperationException();
     }
 }