diff --git a/setup.py b/setup.py
index 622b527c9774beaab113e4fffb24f013d54f16ef..be3a710e5295b110d352dd3777f6e9ec3c2b34d9 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ setuptools.setup(
     url="https://github.com/usgs/geomag-algorithms",
     packages=setuptools.find_packages(exclude=["test*"]),
     python_requires=">=3.6, <4",
-    install_requires=["obspy"],
+    install_requires=["numpy", "scipy", "obspy"],
     extras_require={
         "url": ["pycurl"],
         "webservice": [