diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index e7fea6c..f039f83 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -31,7 +31,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+                python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
         # Service containers to run with `container-job`
         services:
@@ -78,7 +78,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+                python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
         steps:
             - uses: actions/checkout@v4
diff --git a/piccolo_api/crud/exceptions.py b/piccolo_api/crud/exceptions.py
index 42ccb9b..b66caf0 100644
--- a/piccolo_api/crud/exceptions.py
+++ b/piccolo_api/crud/exceptions.py
@@ -11,10 +11,14 @@
     from asyncpg.exceptions import (
         ForeignKeyViolationError,
         NotNullViolationError,
+        RestrictViolationError,
         UniqueViolationError,
     )
 except ImportError:
 
+    class RestrictViolationError(Exception):  # type: ignore
+        pass
+
     class ForeignKeyViolationError(Exception):  # type: ignore
         pass
 
@@ -82,7 +86,7 @@ async def inner(*args, **kwargs):
                 },
                 status_code=422,
             )
-        except ForeignKeyViolationError as exception:
+        except (ForeignKeyViolationError, RestrictViolationError) as exception:
             # This is raised when we have an `ON DELETE RESTRICT` constraint
             # on a foreign key, which prevents us from deleting a row if it's
             # referenced by a foreign key.
diff --git a/setup.py b/setup.py
index 8aa7e28..5528c59 100644
--- a/setup.py
+++ b/setup.py
@@ -68,7 +68,7 @@ def extras_require() -> dict[str, list[str]]:
     long_description_content_type="text/markdown",
     author="Daniel Townsend",
     author_email="dan@dantownsend.co.uk",
-    python_requires=">=3.9.0",
+    python_requires=">=3.10.0",
     url="https://github.com/piccolo-orm/piccolo_api",
     packages=find_packages(exclude=("tests",)),
     package_data={
@@ -84,11 +84,11 @@ def extras_require() -> dict[str, list[str]]:
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Programming Language :: Python :: Implementation :: CPython",
     ],
 )