diff --git a/setup.py b/setup.py
index 5ec602b..9f4ac05 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@ setup(
     ],
     install_requires=[
         'fqdn',
-        'peewee',
+        'peewee<3',
     ],
     scripts=[
         'bin/ca-server',