diff --git a/setup.cfg b/setup.cfg
index 00ca9de..e95d75f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -20,7 +20,7 @@ package_dir =
 packages =
     adapter
     core
-    judger-cli
+    judger_cli
 python_requires = >=3.7
 
 [options.packages.find]
@@ -31,5 +31,5 @@ exclude =
 
 [options.entry_points]
 console_scripts =
-    judger_cli = judger-cli.cli:main
+    judger_cli = judger_cli.cli:main
     judger_adapter = adapter.main:main
\ No newline at end of file
diff --git a/src/judger-cli/__init__.py b/src/judger_cli/__init__.py
similarity index 100%
rename from src/judger-cli/__init__.py
rename to src/judger_cli/__init__.py
diff --git a/src/judger-cli/__main__.py b/src/judger_cli/__main__.py
similarity index 100%
rename from src/judger-cli/__main__.py
rename to src/judger_cli/__main__.py
diff --git a/src/judger-cli/cli.py b/src/judger_cli/cli.py
similarity index 97%
rename from src/judger-cli/cli.py
rename to src/judger_cli/cli.py
index 02ee6a7..04afc45 100644
--- a/src/judger-cli/cli.py
+++ b/src/judger_cli/cli.py
@@ -13,7 +13,7 @@
 
 
 def main():
-    parser = argparse.ArgumentParser(prog="judger-cli", description="CLI for SaibloLocalJudger Core")
+    parser = argparse.ArgumentParser(prog="judger_cli", description="CLI for SaibloLocalJudger Core")
     parser.add_argument("--port", type=int, help="Tcp server listening port. Default port is random.", default=0)
     parser.add_argument("--playerCount", type=int, help="Required. Count of players to start a game.")
     parser.add_argument("--configFile", type=str, help="Game config file.")