diff --git a/ocr_api/requirements.txt b/ocr_api/requirements.txt
index 6120e04..29691c0 100644
--- a/ocr_api/requirements.txt
+++ b/ocr_api/requirements.txt
@@ -2,7 +2,7 @@ easydict==1.7
 tensorflow_gpu==1.3.0
 scipy==0.18.1
 numpy==1.11.1
-opencv_python==3.4.0.12
+opencv_python==3.4.7.28
 Cython==0.27.3
 Pillow==5.0.0
 PyYAML==3.12