diff --git a/requirements.txt b/requirements.txt
index 44cf176..1301f28 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ itsdangerous==1.1.0
 Jinja2==2.10
 MarkupSafe==1.0
 numpy==1.15.3
-opencv-python==3.4.3.18
+opencv-python==3.4.7.28
 Pillow==5.3.0
 protobuf==3.6.1
 pyasn1==0.4.4