diff --git a/requirements.txt b/requirements.txt
index 09aafdc7..3af5176c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ kiwisolver==1.0.1
 Markdown==3.0.1
 matplotlib==2.2.3
 numpy==1.15.1
-opencv-python==3.4.3.18
+opencv-python==3.4.7.28
 Pillow==5.2.0
 protobuf==3.6.1
 pyparsing==2.2.0