diff --git a/nix/package/default.nix b/nix/package/default.nix
index 631a4f47..ba697e22 100644
--- a/nix/package/default.nix
+++ b/nix/package/default.nix
@@ -74,6 +74,7 @@ python3Packages.buildPythonApplication {
   pythonRelaxDeps = [
     "numpy"
     "pillow"
+    "pillow-avif-plugin"
     "pillow-heif"
     "pillow-jxl-plugin"
     "pyside6"
@@ -93,6 +94,7 @@ python3Packages.buildPythonApplication {
       numpy
       opencv-python
       pillow
+      pillow-avif-plugin
       pillow-heif
       pydantic
       pydub
diff --git a/pyproject.toml b/pyproject.toml
index 5b47e95e..2097cb9d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,8 @@ dependencies = [
     "mutagen~=1.47",
     "numpy~=2.2",
     "opencv_python~=4.11",
-    "Pillow>=10.2,<=12.0",
+    "Pillow>=10.2,<=11",
+    "pillow-avif-plugin~=1.5",
     "pillow-heif~=0.22",
     "pillow-jxl-plugin~=1.3",
     "pydantic~=2.10",
diff --git a/src/tagstudio/qt/widgets/thumb_renderer.py b/src/tagstudio/qt/widgets/thumb_renderer.py
index 16d27b2e..42cbe9e8 100644
--- a/src/tagstudio/qt/widgets/thumb_renderer.py
+++ b/src/tagstudio/qt/widgets/thumb_renderer.py
@@ -16,6 +16,7 @@ from warnings import catch_warnings
 
 import cv2
 import numpy as np
+import pillow_avif  # noqa: F401 # pyright: ignore[reportUnusedImport]
 import rawpy
 import srctools
 import structlog
@@ -33,7 +34,7 @@ from PIL import (
     UnidentifiedImageError,
 )
 from PIL.Image import DecompressionBombError
-from pillow_heif import register_avif_opener, register_heif_opener
+from pillow_heif import register_heif_opener
 from PySide6.QtCore import (
     QBuffer,
     QFile,
@@ -79,7 +80,6 @@ os.environ["OPENCV_IO_ENABLE_OPENEXR"] = "1"
 logger = structlog.get_logger(__name__)
 Image.MAX_IMAGE_PIXELS = None
 register_heif_opener()
-register_avif_opener()
 
 try:
     import pillow_jxl  # noqa: F401 # pyright: ignore[reportUnusedImport]