diff --git a/requirements.txt b/requirements.txt
index c2435ec..1f66800 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,3 +28,4 @@ trove_classifiers==2023.5.24
 truststore==0.7.0
 urllib3_secure_extra==0.1.0
 xmlrpclib==1.0.1
+Cython