diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1de7b951..b7d5a4be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Index ePub documents for full-text search, with a new `get_epub_index_data` helper and automatic indexing of ePub items, like PDFs already are (#333)
 
+### Removed
+
+- **BREAKING** Remove deprecated `convert` parameter from `optimize_image` (use `dst_format` instead) (#292)
+
 ### Fixed
 
 - Carry a script's top-level `const`, `let` and `class` declarations across the wombat block, so other scripts on the page can still see them (#329)
diff --git a/src/zimscraperlib/image/optimization.py b/src/zimscraperlib/image/optimization.py
index 5f9c7d09..abf8d2bd 100644
--- a/src/zimscraperlib/image/optimization.py
+++ b/src/zimscraperlib/image/optimization.py
@@ -23,7 +23,6 @@
 import pathlib
 import subprocess
 import tempfile
-import warnings
 from dataclasses import dataclass
 
 import piexif  # pyright: ignore[reportMissingTypeStubs]
@@ -407,7 +406,6 @@ def optimize_image(
     *,
     dst_format: str | None = None,
     delete_src: bool = False,
-    convert: bool | str = False,
 ) -> pathlib.Path | io.BytesIO:
     """Optimize image, automatically selecting correct optimizer
 
@@ -415,22 +413,7 @@ def optimize_image(
         dst_format: format of the destination image,
             required when dst is io.BytesIO.
         delete_src: whether to remove src file upon success (boolean)
-            values: True | False
-        convert: will be deprecated in scraperlib 6, use dst_format instead.
-            values: False: don't convert
-                    True: convert to format implied by dst suffix
-                    str: convert to the specified format"""
-
-    if convert is not False:
-        warnings.warn(
-            "The 'convert' param is deprecated and will be removed in scraperlib 6."
-            "Use 'dst_format' parameter instead.",
-            DeprecationWarning,
-            stacklevel=2,
-        )
-
-        if isinstance(convert, str):
-            dst_format = convert
+            values: True | False"""
 
     if options is None:
         options = OptimizeOptions.of()
diff --git a/tests/image/test_image.py b/tests/image/test_image.py
index 98fd03cb..5037c86d 100644
--- a/tests/image/test_image.py
+++ b/tests/image/test_image.py
@@ -633,24 +633,22 @@ def test_optimize_image_delete_src_not_applicable_for_bytes():
         optimize_image(src, dst, dst_format="png", delete_src=True)
 
 
-def test_optimize_image_deprecated_convert_str(png_image: pathlib.Path):
+def test_optimize_image_convert_format_bytesio(png_image: pathlib.Path):
     src = png_image
     dst = io.BytesIO()
-    with pytest.warns(DeprecationWarning, match="The 'convert' param is deprecated"):
-        optimize_image(src, dst, convert="jpg")
+    optimize_image(src, dst, dst_format="jpg")
 
     dst.seek(0)
     assert Image.open(dst).format == "JPEG"
 
 
-def test_optimize_image_deprecated_convert_true(
+def test_optimize_image_convert_format_path(
     png_image: pathlib.Path, tmp_path: pathlib.Path
 ):
     src = png_image
     dst = tmp_path / "out.jpg"
 
-    with pytest.warns(DeprecationWarning, match="The 'convert' param is deprecated"):
-        optimize_image(src, dst, convert=True)
+    optimize_image(src, dst)
 
     assert dst.exists()
     assert Image.open(dst).format == "JPEG"