diff --git a/requirements.txt b/requirements.txt
index 51de7735d301..fd187eb56cfe 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,6 @@
 # pip install -r requirements.txt
 
 # base ----------------------------------------
-Cython
 matplotlib>=3.2.2
 numpy>=1.18.5
 opencv-python>=4.1.2