diff --git a/setup.py b/setup.py
index e100267..56b426b 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 AUTHOR = "François Leblanc"
 
 # What packages are required for this module to be executed?
-REQUIRED = ["numpy>=1.10", "opencv-python>=3, <4", "Pillow>5"]
+REQUIRED = ["numpy>=1.10", "opencv-python>=3, <5", "Pillow>5"]
 
 # The rest you shouldn't have to touch too much :)
 # ------------------------------------------------