diff --git a/src/requirements.txt b/src/requirements.txt
index ca4ce59..2945731 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -1,4 +1,5 @@
 setuptools
 wheel
 twine
-pytest
\ No newline at end of file
+pytest
+numpy
\ No newline at end of file
diff --git a/src/setup.py b/src/setup.py
index 19958aa..e686f03 100644
--- a/src/setup.py
+++ b/src/setup.py
@@ -4,7 +4,9 @@
     name='statsy',
     version='0.2.0',
     packages=find_packages(),
-    install_requires=[],
+    install_requires=[
+        "numpy>=1.25.0"
+        ],
     python_requires='>=3.6',
     license='Apache License 2.0',
     description='A package of statistical functions and operations.',