diff --git a/NuWeather/setup.py b/NuWeather/setup.py
index fec0250..2faf293 100644
--- a/NuWeather/setup.py
+++ b/NuWeather/setup.py
@@ -5,5 +5,6 @@ plugin_setup(
     'NuWeather',
     install_requires=[
         'pendulum',
+        'haversine',
     ],
 )