diff --git a/requirements.txt b/requirements.txt
index 6fa7873e..532a7e96 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ pydantic==1.8.1        # Input validation
 # Database connections and management
 psycopg2-binary==2.8.6; platform_python_implementation == "CPython"
 psycopg2cffi==2.9.0; platform_python_implementation == "PyPy"
-SQLAlchemy==1.4.2
+SQLAlchemy==1.3.23 # pyup: <1.4  # https://github.com/irrdnet/irrd/issues/475
 alembic==1.5.7
 ujson==4.0.2