diff --git a/CHANGELOG.md b/CHANGELOG.md
index 458b928f..b9336daf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,9 +21,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - `Padding`, `AlignedPadding`, `ExactPadding`, etc.
 - Support for Pillow 10. ([8cfebe2])
 - Static Typing & Type Checking Support ([#100]).
+- `TermImageUserWarning` warning sub-category ([d710a9e]).
 
 ### Changed
 - `term_image.utils.get_cell_size()` now returns `term_image.geometry.Size` instances in place of tuples ([#96]).
+- `TermImageWarning` now inherits from `Warning` instead of `UserWarning` ([d710a9e]).
 
 ### Removed
 - Support for Python 3.7. ([594d451])
@@ -39,6 +41,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [594d451]: https://github.com/AnonymouX47/term-image/commit/594d451d124a47c73a9dce61a4496a2a218261b1
 [8cfebe2]: https://github.com/AnonymouX47/term-image/commit/8cfebe27b63dcdd987fc9d0c71616e76777779a9
 [b790f0e]: https://github.com/AnonymouX47/term-image/commit/b790f0e7c5cd2afd7dafa7c14797136719b9dafb
+[d710a9e]: https://github.com/AnonymouX47/term-image/commit/d710a9e95e149868490f5d38eb3339df68716999
 
 
 ## [0.7.0] - 2023-06-05
diff --git a/src/term_image/_utils.py b/src/term_image/_utils.py
index 324fe8a2..8871f66c 100644
--- a/src/term_image/_utils.py
+++ b/src/term_image/_utils.py
@@ -30,7 +30,7 @@
 import term_image
 
 from . import _ctlseqs as ctlseqs
-from .exceptions import TermImageWarning
+from .exceptions import TermImageUserWarning
 
 # import logging
 
@@ -730,7 +730,7 @@ def _process_start_wrapper(self, *args, **kwargs):
                     "using `term_image.disable_queries()`.\n"
                     "Simply set an 'ignore' filter for this warning (before starting "
                     "any subprocess) if not using any of the affected features.",
-                    TermImageWarning,
+                    TermImageUserWarning,
                 )
         else:
             self._tty_lock = _tty_lock
@@ -805,8 +805,8 @@ def _process_run_wrapper(self, *args, **kwargs):
                 ".html#active-terminal\n"
                 "Any filter for this warning must be set before loading `term_image`, "
                 "using `UserWarning` with the warning message (since "
-                "`TermImageWarning` won't be available).",
-                TermImageWarning,
+                "`TermImageUserWarning` won't be available).",
+                TermImageUserWarning,
             )
 
     if _tty_fd != -1:
diff --git a/src/term_image/exceptions.py b/src/term_image/exceptions.py
index c731bd67..8a0379f5 100644
--- a/src/term_image/exceptions.py
+++ b/src/term_image/exceptions.py
@@ -5,8 +5,12 @@
 from __future__ import annotations
 
 
-class TermImageWarning(UserWarning):
-    """Package-specific warning category."""
+class TermImageWarning(Warning):
+    """Package-specific warning base category."""
+
+
+class TermImageUserWarning(TermImageWarning, UserWarning):
+    """Package-specific user warning sub-category."""
 
 
 class TermImageError(Exception):
@@ -31,10 +35,3 @@ class URLNotFoundError(TermImageError, FileNotFoundError):
 
 class UrwidImageError(TermImageError):
     """Raised for errors specific to :py:class:`~term_image.widget.UrwidImage`."""
-
-
-__all__ = ["TermImageWarning"] + [
-    name
-    for name, obj in vars().items()
-    if isinstance(obj, type) and issubclass(obj, TermImageError)
-]
diff --git a/src/term_image/image/iterm2.py b/src/term_image/image/iterm2.py
index 6094466b..c8224e63 100644
--- a/src/term_image/image/iterm2.py
+++ b/src/term_image/image/iterm2.py
@@ -25,7 +25,7 @@
     get_terminal_name_version,
     write_tty,
 )
-from ..exceptions import RenderError, TermImageWarning
+from ..exceptions import RenderError, TermImageUserWarning
 from .common import GraphicsImage, ImageMeta, ImageSource
 
 # Constants for render methods
@@ -386,7 +386,7 @@ class ITerm2Image(GraphicsImage, metaclass=ITerm2ImageMeta):
 
             Can not be reset via an instance.
 
-        :py:class:`~term_image.exceptions.TermImageWarning` is issued (and shown
+        :py:class:`~term_image.exceptions.TermImageUserWarning` is issued (and shown
         **only the first time**, except the warning filters are modified to do
         otherwise) if the image data size for a native animation is above this value.
 
@@ -628,7 +628,7 @@ def _render_image(
                 if compressed_image.tell() > self.native_anim_max_bytes:
                     warnings.warn(
                         "Image data size above the maximum for native animation",
-                        TermImageWarning,
+                        TermImageUserWarning,
                     )
 
                 control_data = "".join(
diff --git a/tests/test_image/test_iterm2.py b/tests/test_image/test_iterm2.py
index a8e8b08a..bba1f66a 100644
--- a/tests/test_image/test_iterm2.py
+++ b/tests/test_image/test_iterm2.py
@@ -11,7 +11,7 @@
 from PIL.WebPImagePlugin import WebPImageFile
 
 from term_image import _ctlseqs as ctlseqs
-from term_image.exceptions import RenderError, StyleError, TermImageWarning
+from term_image.exceptions import RenderError, StyleError, TermImageUserWarning
 from term_image.image import iterm2
 from term_image.image.iterm2 import ANIM, LINES, WHOLE, ITerm2Image
 
@@ -1196,7 +1196,7 @@ def test_unknown_format(self):
     # Image data size limit
     def test_max_bytes(self):
         ITerm2Image.native_anim_max_bytes = 300000
-        with pytest.warns(TermImageWarning, match="maximum for native animation"):
+        with pytest.warns(TermImageUserWarning, match="maximum for native animation"):
             self.render_native_anim(self.apng_image)
         self.render_native_anim(self.gif_image)