diff --git a/server/leanserver/GameServer/Commands.lean b/server/leanserver/GameServer/Commands.lean
index 5ac3717..257def4 100644
--- a/server/leanserver/GameServer/Commands.lean
+++ b/server/leanserver/GameServer/Commands.lean
@@ -1,4 +1,3 @@
-import Lean
 import GameServer.EnvExtensions
 
 open Lean Meta Elab Command
diff --git a/server/leanserver/GameServer/EnvExtensions.lean b/server/leanserver/GameServer/EnvExtensions.lean
index 200082c..19313b6 100644
--- a/server/leanserver/GameServer/EnvExtensions.lean
+++ b/server/leanserver/GameServer/EnvExtensions.lean
@@ -1,6 +1,5 @@
-import Lean
-import GameServer.Graph
 import GameServer.AbstractCtx
+import GameServer.Graph
 
 /-! # Environment extensions
 
diff --git a/server/leanserver/GameServer/FileWorker.lean b/server/leanserver/GameServer/FileWorker.lean
index 9075307..bdacdf6 100644
--- a/server/leanserver/GameServer/FileWorker.lean
+++ b/server/leanserver/GameServer/FileWorker.lean
@@ -1,11 +1,6 @@
 /- This file is mostly copied from `Lean/Server/FileWorker.lean`. -/
-
-import Lean
-import GameServer.EnvExtensions
-import GameServer.RpcHandlers
-import GameServer.Game
-
 import Lean.Server.FileWorker
+import GameServer.Game
 
 namespace MyModule
 open Lean
diff --git a/server/leanserver/GameServer/Game.lean b/server/leanserver/GameServer/Game.lean
index 8d018c9..0674dc8 100644
--- a/server/leanserver/GameServer/Game.lean
+++ b/server/leanserver/GameServer/Game.lean
@@ -1,8 +1,5 @@
-import Lean
-import GameServer.EnvExtensions
 import GameServer.RpcHandlers
 
-
 open Lean
 
 structure GameServerState :=
diff --git a/server/leanserver/GameServer/RpcHandlers.lean b/server/leanserver/GameServer/RpcHandlers.lean
index 78304a5..8cdc928 100644
--- a/server/leanserver/GameServer/RpcHandlers.lean
+++ b/server/leanserver/GameServer/RpcHandlers.lean
@@ -1,4 +1,3 @@
-import Lean
 import GameServer.EnvExtensions
 import GameServer.InteractiveGoal
 
diff --git a/server/leanserver/GameServer/Watchdog.lean b/server/leanserver/GameServer/Watchdog.lean
index 8b6cfca..e3ad48f 100644
--- a/server/leanserver/GameServer/Watchdog.lean
+++ b/server/leanserver/GameServer/Watchdog.lean
@@ -1,7 +1,6 @@
 /- This file is mostly copied from `Lean/Server/Watchdog.lean`. -/
-import Lean
-import GameServer.Game
 import Lean.Server.Watchdog
+import GameServer.Game
 
 namespace MyServer.Watchdog
 open Lean
diff --git a/server/leanserver/Main.lean b/server/leanserver/Main.lean
index 39964b7..d18aac9 100644
--- a/server/leanserver/Main.lean
+++ b/server/leanserver/Main.lean
@@ -1,6 +1,5 @@
-import GameServer.Watchdog
 import GameServer.FileWorker
-
+import GameServer.Watchdog
 
 unsafe def main : List String → IO UInt32 := fun args => do
   let e ← IO.getStderr