diff --git a/src/diagram2graph/requirements.txt b/src/diagram2graph/requirements.txt
index 2a2b5c888..182224218 100644
--- a/src/diagram2graph/requirements.txt
+++ b/src/diagram2graph/requirements.txt
@@ -1,6 +1,6 @@
 # pip install -r requirements.txt
 numpy==1.16.2
-opencv-contrib-python==4.0.0.21
+opencv-contrib-python==4.1.1.26
 pillow>=6.2.2
 imutils==0.5.2
 scipy==1.2.1