diff --git a/requirements.txt b/requirements.txt
index 262d2b4..c706e2e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ itsdangerous==0.24
 Jinja2==2.10
 MarkupSafe==1.0
 numpy==1.14.1
-opencv-python==3.4.0.12
+opencv-python==3.4.7.28
 pdfminer.six==20170720
 Pillow==6.2.0
 pkg-resources==0.0.0