diff --git a/requirements.txt b/requirements.txt
index 89a1e867a9a487c813b77388707024c529c59ec6..3ba732b9beb133feade7b6e199eb4eed0b3c00ad 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ scipy
 matplotlib
 cairocffi
 mysqlclient
-sqlalchemy
+sqlalchemy < 2
 sphinx
 sphinx_rtd_theme
 astropy