diff --git a/setup.py b/setup.py
index d10e57f..9e8e98c 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
     "opencv-python~=4.9",
     "tesseract~=0.1",
     "pytesseract~=0.3",
-    "appium-python-client~=2.9",
+    "appium-python-client>=2.9,<5.0",
 ]
 
 extras_require = {