diff --git a/requirements.txt b/requirements.txt
index 607f8ce..9a64e25 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 openslide-python==1.1.1
 Pillow==6.2.0
-opencv-python==3.4.4.19
+opencv-python==4.2.0.32
 scikit-image==0.14.2
 tissueloc==2.0.1
 pyslide==0.4.0