diff --git a/pyproject.toml b/pyproject.toml
index 3b99117..20d1c8f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ gsppy = "gsppy.cli:main"
 
 [project.optional-dependencies]
 dev = [
-    "cython==3.2.3",
+    "cython==3.2.4",
     "hatch==1.16.2",
     "hatchling==1.28.0",
     "pylint==4.0.4",