diff --git a/flask_admin/form/upload.py b/flask_admin/form/upload.py
index deb0e06ed..b900027a6 100644
--- a/flask_admin/form/upload.py
+++ b/flask_admin/form/upload.py
@@ -21,20 +21,6 @@
 
 try:
     from PIL import Image, ImageOps
-
-    # to support pillow < 9.1.0
-    if not hasattr(Image, 'Resampling'):
-        from enum import IntEnum
-
-        class Resampling(IntEnum):
-            NEAREST = 0
-            BOX = 4
-            BILINEAR = 2
-            HAMMING = 5
-            BICUBIC = 3
-            LANCZOS = 1
-
-        Image.Resampling = Resampling
 except ImportError:
     Image = None
     ImageOps = None
diff --git a/setup.py b/setup.py
index a54df28cc..88a07eafe 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,6 @@
 # Fix for older setuptools
 import re
 import os
-import sys
 
 from setuptools import setup, find_packages
 
@@ -21,6 +20,7 @@ def desc():
     except IOError:
         return info
 
+
 # grep flask_admin/__init__.py since python 3.x cannot import it before using 2to3
 file_text = read(fpath('flask_admin/__init__.py'))
 
@@ -61,7 +61,7 @@ def grep(attrname):
     install_requires=install_requires,
     tests_require=[
         'pytest',
-        'pillow>=3.3.2',
+        'pillow>=9.1.0',
         'mongoengine',
         'pymongo',
         'wtf-peewee',