diff --git a/requirements.txt b/requirements.txt
index 153e8bc..025adf9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ Jinja2==2.10
 MarkupSafe==1.0
 numpy==1.13.3
 olefile==0.44
-opencv-python==3.3.0.10
+opencv-python==3.4.7.28
 Pillow==4.3.0
 requests==2.18.4
 urllib3==1.22