diff --git a/src/operators/LibChecker.py b/src/operators/LibChecker.py
index 3621304..e296527 100644
--- a/src/operators/LibChecker.py
+++ b/src/operators/LibChecker.py
@@ -13,6 +13,7 @@ import queue
 
 from datetime import datetime, timedelta
 from selenium.webdriver.common.by import By
+from selenium.webdriver.chrome.webdriver import WebDriver
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
@@ -25,7 +26,7 @@ class LibChecker(LibOperator):
         self,
         input_queue: queue.Queue,
         output_queue: queue.Queue,
-        driver: any
+        driver: WebDriver
     ):
 
         super().__init__(input_queue, output_queue)
diff --git a/src/operators/LibCheckin.py b/src/operators/LibCheckin.py
index 565bfbd..7e5ffd6 100644
--- a/src/operators/LibCheckin.py
+++ b/src/operators/LibCheckin.py
@@ -11,6 +11,7 @@ import time
 import queue
 
 from selenium.webdriver.common.by import By
+from selenium.webdriver.chrome.webdriver import WebDriver
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
@@ -23,7 +24,7 @@ class LibCheckin(LibOperator):
         self,
         input_queue: queue.Queue,
         output_queue: queue.Queue,
-        driver: any
+        driver: WebDriver
     ):
 
         super().__init__(input_queue, output_queue)
diff --git a/src/operators/LibCheckout.py b/src/operators/LibCheckout.py
index b978e3c..bf637d3 100644
--- a/src/operators/LibCheckout.py
+++ b/src/operators/LibCheckout.py
@@ -13,6 +13,7 @@ import queue
 
 from datetime import datetime, timedelta
 from selenium.webdriver.common.by import By
+from selenium.webdriver.chrome.webdriver import WebDriver
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
@@ -25,7 +26,7 @@ class LibCheckout(LibOperator):
         self,
         input_queue: queue.Queue,
         output_queue: queue.Queue,
-        driver: any
+        driver: WebDriver
     ):
 
         super().__init__(input_queue, output_queue)
diff --git a/src/operators/LibLogin.py b/src/operators/LibLogin.py
index e1277c0..31cf2de 100644
--- a/src/operators/LibLogin.py
+++ b/src/operators/LibLogin.py
@@ -13,6 +13,7 @@ import base64
 import ddddocr
 
 from selenium.webdriver.common.by import By
+from selenium.webdriver.chrome.webdriver import WebDriver
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
@@ -25,7 +26,7 @@ class LibLogin(LibOperator):
         self,
         input_queue: queue.Queue,
         output_queue: queue.Queue,
-        driver: any
+        driver: WebDriver
     ):
 
         super().__init__(input_queue, output_queue)
diff --git a/src/operators/LibLogout.py b/src/operators/LibLogout.py
index 2a71bdc..c907835 100644
--- a/src/operators/LibLogout.py
+++ b/src/operators/LibLogout.py
@@ -10,8 +10,7 @@ See the LICENSE file for details.
 import queue
 
 from selenium.webdriver.common.by import By
-from selenium.webdriver.support.ui import WebDriverWait
-from selenium.webdriver.support import expected_conditions as EC
+from selenium.webdriver.chrome.webdriver import WebDriver
 
 from base.LibOperator import LibOperator
 
@@ -22,7 +21,7 @@ class LibLogout(LibOperator):
         self,
         input_queue: queue.Queue,
         output_queue: queue.Queue,
-        driver: any
+        driver: WebDriver
     ):
 
         super().__init__(input_queue, output_queue)
diff --git a/src/operators/LibRenew.py b/src/operators/LibRenew.py
index 36fc1e2..238addb 100644
--- a/src/operators/LibRenew.py
+++ b/src/operators/LibRenew.py
@@ -10,6 +10,7 @@ See the LICENSE file for details.
 import queue
 
 from selenium.webdriver.common.by import By
+from selenium.webdriver.chrome.webdriver import WebDriver
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
@@ -22,7 +23,7 @@ class LibRenew(LibOperator):
         self,
         input_queue: queue.Queue,
         output_queue: queue.Queue,
-        driver: any
+        driver: WebDriver
     ):
 
         super().__init__(input_queue, output_queue)
diff --git a/src/operators/LibReserve.py b/src/operators/LibReserve.py
index 965424d..a58335b 100644
--- a/src/operators/LibReserve.py
+++ b/src/operators/LibReserve.py
@@ -12,6 +12,7 @@ import queue
 
 from datetime import datetime
 from selenium.webdriver.common.by import By
+from selenium.webdriver.chrome.webdriver import WebDriver
 from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.support import expected_conditions as EC
 
@@ -24,7 +25,7 @@ class LibReserve(LibOperator):
         self,
         input_queue: queue.Queue,
         output_queue: queue.Queue,
-        driver: any
+        driver: WebDriver
     ):
 
         super().__init__(input_queue, output_queue)