diff --git a/requirements.txt b/requirements.txt
index 6885e61..0dcd3f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-numpy >= 1.23.3
+numpy >= 1.23.3,<2
 scipy >=1.10.1
 pymatgen > 2022.9.21
 seaborn >=0.13.0
diff --git a/setup.py b/setup.py
index 08a6845..e988299 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@
     },
     test_suite="elementembeddings.tests.test",
     install_requires=[
-        "numpy>=1.23.3",
+        "numpy>=1.23.3,<2",
         "scipy>=1.10.1",
         "pymatgen>2022.9.21",
         "seaborn>=0.13.0",