diff --git a/README.md b/README.md
index 1ba0bc5..63755f7 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
 
 ## 环境要求
 
-- Minecraft **1.21.8**
+- Minecraft **1.21.11**
 - Java **21+**
 - Fabric Loader **≥ 0.19.5**
 - Fabric API
diff --git a/gradle.properties b/gradle.properties
index b713729..0ae8094 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,14 +5,14 @@ org.gradle.configuration-cache=true
 
 # Fabric Properties
 # check these on https://fabricmc.net/develop
-minecraft_version=1.21.8
-yarn_mappings=1.21.8+build.1
+minecraft_version=1.21.11
+yarn_mappings=1.21.11+build.6
 loader_version=0.19.5
 loom_version=1.18-SNAPSHOT
 
 # Mod Properties
-version=1.2.0-1.21.8
+version=1.2.0-1.21.11
 group=top.gtb520.java.mods.openfly
 
 # Dependencies
-fabric_api_version=0.136.1+1.21.8
+fabric_api_version=0.141.6+1.21.11
diff --git a/src/main/java/top/gtb520/java/mods/openfly/Commands/fly.java b/src/main/java/top/gtb520/java/mods/openfly/Commands/fly.java
index 73001f5..f3ff1e1 100644
--- a/src/main/java/top/gtb520/java/mods/openfly/Commands/fly.java
+++ b/src/main/java/top/gtb520/java/mods/openfly/Commands/fly.java
@@ -9,6 +9,7 @@ import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
 import net.fabricmc.fabric.api.entity.event.v1.ServerLivingEntityEvents;
 import net.fabricmc.fabric.api.entity.event.v1.ServerPlayerEvents;
 import net.fabricmc.loader.api.FabricLoader;
+import net.minecraft.command.DefaultPermissions;
 import net.minecraft.command.argument.EntityArgumentType;
 import net.minecraft.entity.damage.DamageTypes;
 import net.minecraft.server.command.CommandManager;
@@ -31,7 +32,7 @@ public class fly {
 
     // 飞行速度范围（/fly speed 参数范围）
     public static final float MIN_FLY_SPEED = 0.01F;
-    public static final float MAX_FLY_SPEED = 0.15F;
+    public static final float MAX_FLY_SPEED = 0.13F;
 
     private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
 
@@ -86,7 +87,7 @@ public class fly {
                                             })))
                             // /fly player <player> - 切换指定玩家的飞行状态（需要OP权限）
                             .then(CommandManager.literal("player")
-                                    .requires(source -> source.hasPermissionLevel(2))
+                                    .requires(source -> source.getPermissions().hasPermission(DefaultPermissions.GAMEMASTERS))
                                     .then(CommandManager.argument("player", EntityArgumentType.player())
                                             .executes(context -> {
                                                 ServerPlayerEntity targetPlayer = EntityArgumentType.getPlayer(context, "player");
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
index fabf105..9aaf14d 100644
--- a/src/main/resources/fabric.mod.json
+++ b/src/main/resources/fabric.mod.json
@@ -27,7 +27,7 @@
 	],
 	"depends": {
 		"fabricloader": ">=0.19.5",
-		"minecraft": "~1.21.8",
+		"minecraft": "~1.21.11",
 		"java": ">=21",
 		"fabric-api": "*"
 	}