diff --git a/setup.py b/setup.py
index 5d2306c..648aca6 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@ requires = [
     'pyramid_jinja2',
     'pyramid_debugtoolbar',
     'waitress',
-    'alembic',
+    'alembic==1.4.2',
     'pyramid_mailer',
     'pyramid_retry',
     'pyramid_tm',