diff --git a/ost-python/ost/requirements.txt b/ost-python/ost/requirements.txt
index ec703bc..4d3b336 100644
--- a/ost-python/ost/requirements.txt
+++ b/ost-python/ost/requirements.txt
@@ -1,6 +1,6 @@
 h5py==2.8.0
 numpy==1.15.3
 object-detection==0.1
-opencv-python==3.4.3.18
+opencv-python==3.4.7.28
 six==1.11.0
 slim==0.1