diff --git a/requirements.txt b/requirements.txt
index 4e2866a..6dede2b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-Cython==0.29.27
+Cython==0.29.33
 numpy==1.19.4
 requests
 flask-login==0.5.0