diff --git a/environment.yml b/environment.yml
index 24b702a..0a9ba52 100644
--- a/environment.yml
+++ b/environment.yml
@@ -4,7 +4,7 @@ channels:
   - defaults
 dependencies:
   - python=3.11
-  - Pillow>=5.2.0
+  - Pillow>=11.3.0
   - psutil>=5.9.5
   - python-slugify>=1.2.1
   - raven>=6.0.0
diff --git a/kindlecomicconverter/comic2ebook.py b/kindlecomicconverter/comic2ebook.py
index 1b9dc83..eaf2074 100755
--- a/kindlecomicconverter/comic2ebook.py
+++ b/kindlecomicconverter/comic2ebook.py
@@ -820,7 +820,7 @@ def removeNonImages(filetree):
     for root, dirs, files in os.walk(filetree):
         for name in files:
             _, ext = getImageFileName(name)
-            if ext not in ('.png', '.jpg', '.jpeg', '.gif', '.webp', '.jp2'):
+            if ext not in ('.png', '.jpg', '.jpeg', '.gif', '.webp', '.jp2', '.avif'):
                 if os.path.exists(os.path.join(root, name)):
                     os.remove(os.path.join(root, name))
     # remove empty nested folders
diff --git a/kindlecomicconverter/shared.py b/kindlecomicconverter/shared.py
index 3993391..1a4c1b3 100644
--- a/kindlecomicconverter/shared.py
+++ b/kindlecomicconverter/shared.py
@@ -116,10 +116,10 @@ def dependencyCheck(level):
             missing.append('python-slugify 1.2.1+')
     try:
         from PIL import __version__ as pillowVersion
-        if Version('5.2.0') > Version(pillowVersion):
-            missing.append('Pillow 5.2.0+')
+        if Version('11.3.0') > Version(pillowVersion):
+            missing.append('Pillow 11.3.0+')
     except ImportError:
-        missing.append('Pillow 5.2.0+')
+        missing.append('Pillow 11.3.0+')
     if len(missing) > 0:
         print('ERROR: ' + ', '.join(missing) + ' is not installed!')
         sys.exit(1)
diff --git a/requirements.txt b/requirements.txt
index 8d0e11a..edee66a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 PySide6>=6.5.1
-Pillow>=5.2.0
+Pillow>=11.3.0
 psutil>=5.9.5
 requests>=2.31.0
 python-slugify>=1.2.1
diff --git a/setup.py b/setup.py
index 13a36b0..b2cc1ed 100644
--- a/setup.py
+++ b/setup.py
@@ -75,7 +75,7 @@ setuptools.setup(
     packages=['kindlecomicconverter'],
     install_requires=[
         'pyside6>=6.5.1',
-        'Pillow>=5.2.0',
+        'Pillow>=11.3.0',
         'psutil>=5.9.5',
         'python-slugify>=1.2.1,<9.0.0',
         'raven>=6.0.0',
@@ -83,7 +83,7 @@ setuptools.setup(
         'mozjpeg-lossless-optimization>=1.1.2',
         'natsort>=8.4.0',
         'distro',
-        'numpy>=1.22.4,<2.0.0'
+        'numpy>=1.22.4'
     ],
     classifiers=[],
     zip_safe=False,