diff --git a/requirements.txt b/requirements.txt
index a6e0ba4..fc4e452 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ numpy~=1.25.1
 ipympl~=0.8.8
 scipy~=1.10.1 
 voila-osscar-template~=0.3.2
-Cython~=0.29.36
+Cython~=3.0.0
 sympy~=1.12
 ase~=3.22.1
 seekpath~=2.1.0