diff --git a/setup.py b/setup.py
index 2ea30c9..97760d0 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,8 @@ install_requires = [
     'python-stdnum',
     'requests',
     'requests-cache',
-    'pycountry'
+    'pycountry',
+    'langid'
 ]
 
 setuptools.setup(