diff --git a/contrib/crowd_counting/requirements.txt b/contrib/crowd_counting/requirements.txt
index 7caf933..0bfb58d 100755
--- a/contrib/crowd_counting/requirements.txt
+++ b/contrib/crowd_counting/requirements.txt
@@ -2,7 +2,7 @@ h5py==2.8.0
 flask==1.0.2
 scikit-image
 bokeh
-opencv-python==3.4.2.17
+opencv-python>=4.2.0.32
 pillow
 Cython
 contextlib2
diff --git a/contrib/crowd_counting/setup.py b/contrib/crowd_counting/setup.py
index 02ca748..140d5c9 100644
--- a/contrib/crowd_counting/setup.py
+++ b/contrib/crowd_counting/setup.py
@@ -8,6 +8,6 @@ setup(
     author_email="lxzhang@gmail.com",
     packages=find_packages(),
     install_requires=[
-        "h5py==2.8.0", "flask==1.0.2", "scikit-image", "bokeh", "opencv-python==3.4.2.17", "pillow", "Cython", "contextlib2"
+        "h5py==2.8.0", "flask==1.0.2", "scikit-image", "bokeh", "opencv-python>=4.2.0.32", "pillow", "Cython", "contextlib2"
     ]
 )
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