diff --git a/.gitignore b/.gitignore
index 493cb2c..6d2c0cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,15 +35,11 @@ var/
 pip-log.txt
 pip-delete-this-directory.txt
 
-# Unit test / coverage reports
+# Unit test reports
 htmlcov/
 .tox/
-.coverage
-.coverage.*
 .cache
 nosetests.xml
-coverage.xml
-*,cover
 .hypothesis/
 
 # Translations
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 897c7c1..ad831d8 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -8,7 +8,7 @@ repos:
       - id: end-of-file-fixer
       - id: trailing-whitespace
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.15.0
+    rev: v3.21.2
     hooks:
       - id: pyupgrade
         args: [--py310-plus]
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index fc9e76e..8d1ee6e 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,6 +7,10 @@ build:
   os: ubuntu-24.04
   tools:
     python: "3.10"
+  jobs:
+    pre_build:
+      - rm -f docs/multicodec.rst docs/modules.rst
+      - python -m sphinx.ext.apidoc -o docs/ multicodec
 
 sphinx:
   configuration: docs/conf.py
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index d7a71df..86300df 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -118,9 +118,6 @@ The project provides several ``make`` targets to help with development:
   run linting, type checking, and tests. This is the recommended command to run
   before submitting a pull request.
 
-* ``make coverage`` - Run tests with coverage reporting and open the HTML report
-  in your browser.
-
 For a full list of available commands, run ``make help``.
 
 7. Commit your changes and push your branch to GitHub::
@@ -150,7 +147,3 @@ Tips
 To run a subset of tests::
 
     $ pytest tests/test_multicodec.py
-
-To run tests with coverage::
-
-    $ make coverage
diff --git a/Makefile b/Makefile
index f74052e..86d65ad 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,6 @@ help:
 	@echo "lint - run pre-commit hooks on all files"
 	@echo "typecheck - run mypy type checking"
 	@echo "test - run tests quickly with the default Python"
-	@echo "coverage - run tests with coverage report"
 	@echo "docs-ci - generate docs for CI"
 	@echo "docs - generate docs and open in browser"
 	@echo "servedocs - serve docs with live reload"
@@ -48,7 +47,6 @@ clean-test:
 	rm -fr .tox/
 	rm -fr .mypy_cache
 	rm -fr .ruff_cache
-	rm -f .coverage
 	rm -fr htmlcov/
 
 setup:
@@ -66,12 +64,6 @@ typecheck:
 test:
 	python -m pytest tests
 
-coverage:
-	coverage run --source multicodec -m pytest tests
-	coverage report -m
-	coverage html
-	$(BROWSER) htmlcov/index.html
-
 docs-ci:
 	rm -f docs/multicodec.rst
 	rm -f docs/modules.rst
diff --git a/README.rst b/README.rst
index 0c10b98..51b6882 100644
--- a/README.rst
+++ b/README.rst
@@ -7,9 +7,6 @@ py-multicodec
 .. image:: https://github.com/multiformats/py-multicodec/actions/workflows/tox.yml/badge.svg?branch=master
         :target: https://github.com/multiformats/py-multicodec/actions/workflows/tox.yml
 
-.. image:: https://codecov.io/gh/multiformats/py-multicodec/branch/master/graph/badge.svg
-        :target: https://codecov.io/gh/multiformats/py-multicodec
-
 .. image:: https://readthedocs.org/projects/py-multicodec/badge/?version=stable
         :target: https://py-multicodec.readthedocs.io/en/stable/?badge=stable
         :alt: Documentation Status
diff --git a/codecov.yaml b/codecov.yaml
deleted file mode 100644
index 66dde9e..0000000
--- a/codecov.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-comment:
-    layout: header, changes, diff, uncovered
diff --git a/docs/conf.py b/docs/conf.py
index f2fd116..fc019b9 100755
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -45,13 +45,13 @@
 templates_path = ['_templates']
 
 # The suffix of source filenames.
-source_suffix = '.rst'
+source_suffix = {'.rst': 'restructuredtext'}
 
 # The encoding of source files.
 # source_encoding = 'utf-8-sig'
 
-# The master toctree document.
-master_doc = 'index'
+# The root toctree document.
+root_doc = 'index'
 
 # General information about the project.
 project = 'py-multicodec'
diff --git a/newsfragments/29.docs.rst b/newsfragments/29.docs.rst
new file mode 100644
index 0000000..c1e8cf2
--- /dev/null
+++ b/newsfragments/29.docs.rst
@@ -0,0 +1 @@
+Fixed Read the Docs build failures by updating deprecated Sphinx settings and adding API documentation generation.
diff --git a/newsfragments/29.internal.rst b/newsfragments/29.internal.rst
new file mode 100644
index 0000000..4b33e77
--- /dev/null
+++ b/newsfragments/29.internal.rst
@@ -0,0 +1 @@
+Dropped ``coverage`` and ``codecov`` references, no longer using it.
diff --git a/pyproject.toml b/pyproject.toml
index 8fbc7cd..1c46e79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,12 +36,9 @@ dev = [
     "Sphinx>=5.0.0",
     "build>=0.9.0",
     "bump-my-version>=1.2.0",
-    "codecov",
-    "coverage>=6.5.0",
     "mypy",
     "pre-commit",
     "pytest",
-    "pytest-cov",
     "pytest-runner",
     "ruff",
     "towncrier>=24,<25",
@@ -63,21 +60,6 @@ include = ["multicodec*"]
 testpaths = ["tests"]
 python_classes = "*TestCase"
 
-[tool.coverage.run]
-source = ["multicodec"]
-
-[tool.coverage.report]
-exclude_lines = [
-    "pragma: no cover",
-    "def __repr__",
-    "if self.debug:",
-    "if settings.DEBUG",
-    "raise AssertionError",
-    "raise NotImplementedError",
-    "if 0:",
-    "if __name__ == .__main__.:",
-]
-
 [tool.towncrier]
 # Read https://github.com/multiformats/py-multicodec/blob/master/newsfragments/README.md for instructions
 directory = "newsfragments"