diff --git a/requirements.txt b/requirements.txt
index a7d9866..d6b4c65 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ kiwisolver==1.0.1
 matplotlib==3.0.3
 mne==0.17.1
 numpy==1.16.2
-opencv-python==4.0.0.21
+opencv-python==4.1.1.26
 pip-tools==3.5.0
 psutil==5.6.1
 pycnbi==0.6.dev0