diff --git a/requirements.txt b/requirements.txt
index e9b2bec..29149dc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 SQLAlchemy>=0.7.8
 psycopg2>=2.4.6
+phonenumbers>=5.4b1
diff --git a/setup.py b/setup.py
index dfb1f28..c441cca 100644
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,8 @@ setup(
     platforms='any',
     install_requires=[
         'SQLAlchemy>=0.7.8',
-        'psycopg2>=2.4.6'
+        'psycopg2>=2.4.6',
+        'phonenumbers>=5.4b1'
     ],
     cmdclass={'test': PyTest},
     classifiers=[