diff --git a/setup.py b/setup.py
index 14ae542f..35c0d1da 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
 
 REQUIREMENTS = [
     "matplotlib",
-    "numpy",
+    "numpy<2",
     "openpyxl",
     "pandas",
     "scipy",