diff --git a/setup.py b/setup.py
index 2dcb7c9..c51035f 100644
--- a/setup.py
+++ b/setup.py
@@ -26,6 +26,9 @@ setup(
     py_modules=['lektor_force_update'],
     url='https://github.com/relikd/lektor-force-update-plugin',
     version='1.0',
+    install_requires=[
+        'Lektor',
+    ],
     classifiers=[
         'Framework :: Lektor',
         'Environment :: Plugins',