diff --git a/requirements-dev.txt b/requirements-dev.txt
index 99851aa..dcdb103 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,6 @@
 codecov
 pandas==1.5.2
+numpy>=1.21.0, <2.0.0
 pre-commit
 pytest
 pytest-cov