diff --git a/requirements.txt b/requirements.txt
index 8503eed..e094001 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 Cython==0.29
 matplotlib==3.0.2
-opencv-python==3.4.3.18
+opencv-python==3.4.7.28
 Pillow==4.3.0
 scikit-image==0.14.2
 scikit-learn==0.20.0