diff --git a/setup.py b/setup.py
index 84a4602..a22ed0b 100644
--- a/setup.py
+++ b/setup.py
@@ -77,7 +77,8 @@ def run(self):
     author_email="hello@mbientlab.com",
     install_requires=[
         'warble >= 1.1, < 2.0',
-        'requests'
+        'requests',
+        'pyserial'
     ],
     cmdclass={
         'build_py': MetaWearBuild,