diff --git a/requirements.txt b/requirements.txt
index 58a418f..26e2d42 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ nbconvert==5.4.0
 nbformat==4.4.0
 notebook==5.7.2
 numpy==1.15.4
-opencv-python==3.4.4.19
+opencv-python==3.4.7.28
 pandocfilters==1.4.2
 parso==0.3.1
 pexpect==4.6.0