diff --git a/concurrent/build.gradle b/nio/build.gradle
similarity index 100%
rename from concurrent/build.gradle
rename to nio/build.gradle
diff --git a/concurrent/src/main/java/nio/EventLoop.java b/nio/src/main/java/nio/EventLoop.java
similarity index 100%
rename from concurrent/src/main/java/nio/EventLoop.java
rename to nio/src/main/java/nio/EventLoop.java
diff --git a/concurrent/src/main/java/nio/NIOServerSocketHandler.java b/nio/src/main/java/nio/NIOServerSocketHandler.java
similarity index 100%
rename from concurrent/src/main/java/nio/NIOServerSocketHandler.java
rename to nio/src/main/java/nio/NIOServerSocketHandler.java
diff --git a/concurrent/src/main/java/nio/NIOSocket.java b/nio/src/main/java/nio/NIOSocket.java
similarity index 100%
rename from concurrent/src/main/java/nio/NIOSocket.java
rename to nio/src/main/java/nio/NIOSocket.java
diff --git a/concurrent/src/main/java/nio/NIOSocketHandler.java b/nio/src/main/java/nio/NIOSocketHandler.java
similarity index 100%
rename from concurrent/src/main/java/nio/NIOSocketHandler.java
rename to nio/src/main/java/nio/NIOSocketHandler.java
diff --git a/concurrent/src/main/java/nio/SelectHandler.java b/nio/src/main/java/nio/SelectHandler.java
similarity index 100%
rename from concurrent/src/main/java/nio/SelectHandler.java
rename to nio/src/main/java/nio/SelectHandler.java
diff --git a/concurrent/src/main/java/scheduler/Job.java b/nio/src/main/java/scheduler/Job.java
similarity index 100%
rename from concurrent/src/main/java/scheduler/Job.java
rename to nio/src/main/java/scheduler/Job.java
diff --git a/concurrent/src/main/java/scheduler/ScheduledTask.java b/nio/src/main/java/scheduler/ScheduledTask.java
similarity index 100%
rename from concurrent/src/main/java/scheduler/ScheduledTask.java
rename to nio/src/main/java/scheduler/ScheduledTask.java
diff --git a/concurrent/src/main/java/scheduler/Task.java b/nio/src/main/java/scheduler/Task.java
similarity index 100%
rename from concurrent/src/main/java/scheduler/Task.java
rename to nio/src/main/java/scheduler/Task.java
diff --git a/concurrent/src/test/java/nio/EventLoopTest.java b/nio/src/test/java/nio/EventLoopTest.java
similarity index 100%
rename from concurrent/src/test/java/nio/EventLoopTest.java
rename to nio/src/test/java/nio/EventLoopTest.java
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 406dcb53..ae1f970d 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -19,6 +19,6 @@ include("parser")
 include("judge")
 include("proc")
 include("web")
-include("concurrent")
+include("nio")
 include("test")
 include("business")