diff --git a/cover/requirements.txt b/cover/requirements.txt
index 1a01ec3..cdb882f 100644
--- a/cover/requirements.txt
+++ b/cover/requirements.txt
@@ -49,7 +49,7 @@ nose==1.3.7
 notebook==5.7.0
 numpy==1.15.2
 oauthlib==2.1.0
-opencv-python==3.4.3.18
+opencv-python==3.4.7.28
 pandocfilters==1.4.2
 parso==0.3.1
 pexpect==4.6.0