diff --git a/setup.py b/setup.py
index 9752a54..960541d 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
 
 ROOT = pathlib.Path(__file__).parent
 
-CYTHON_DEPENDENCY = 'Cython==0.29.22'
+CYTHON_DEPENDENCY = 'Cython(>=0.29.24,<0.30.0)'
 
 
 class httptools_build_ext(build_ext):