diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4d98b44..3805b9a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -94,7 +94,6 @@ jobs:
         pip3 install -r requirements-manager.txt
         pip3 install -r requirements-django.txt
         python3 setup.py install
-        pip3 install --upgrade "sqlalchemy<2"
         pip3 install --global-option=build_ext --global-option="-I/usr/include/gdal" GDAL==`gdal-config --version`
         #pip3 install --upgrade rasterio==1.1.8
     - name: setup test data ⚙️
diff --git a/pygeoapi/provider/postgresql.py b/pygeoapi/provider/postgresql.py
index d56bb78..eb4b214 100644
--- a/pygeoapi/provider/postgresql.py
+++ b/pygeoapi/provider/postgresql.py
@@ -62,7 +62,8 @@ import pyproj
 import shapely
 from sqlalchemy import create_engine, MetaData, PrimaryKeyConstraint, asc, desc
 from sqlalchemy.engine import URL
-from sqlalchemy.exc import InvalidRequestError, OperationalError
+from sqlalchemy.exc import ConstraintColumnNotFoundError, \
+    InvalidRequestError, OperationalError
 from sqlalchemy.ext.automap import automap_base
 from sqlalchemy.orm import Session, load_only
 from sqlalchemy.sql.expression import and_
@@ -515,7 +516,7 @@ def get_table_model(
     sqlalchemy_table_def = metadata.tables[f'{schema}.{table_name}']
     try:
         sqlalchemy_table_def.append_constraint(PrimaryKeyConstraint(id_field))
-    except KeyError:
+    except (ConstraintColumnNotFoundError, KeyError):
         raise ProviderQueryError(
             f"No such id_field column ({id_field}) on {schema}.{table_name}.")
 
diff --git a/requirements.txt b/requirements.txt
index 601f51b..8ea9bd2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,5 +14,5 @@ PyYAML
 rasterio
 requests
 shapely
-SQLAlchemy<2.0.0
+SQLAlchemy
 tinydb