diff --git a/requirements.txt b/requirements.txt
index c2ff549..db2429e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@ nbformat==4.4.0
 notebook==5.7.8
 numpy==1.14.3
 olefile==0.44
-opencv-contrib-python==3.3.0.10
+opencv-contrib-python==3.4.0.12
 openpyxl==2.4.9
 pandocfilters==1.4.2
 pathlib2==2.3.0