diff --git a/requirements.txt b/requirements.txt
index 9766e5b..316293c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ mkl-fft==1.0.6
 mkl-random==1.0.1
 mpi4py==3.0.0
 numpy==1.15.2
-opencv-python==3.4.3.18
+opencv-python==3.4.7.28
 Pillow==5.3.0
 protobuf==3.6.1
 pyglet==1.3.2