diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fb3514c..3e8992e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,7 +33,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -e ".[dev]"
+        pip install -e . --group dev
 
     # - name: Run mypy
     #   run: |
@@ -52,4 +52,4 @@ jobs:
     #   uses: actions/upload-artifact@v3
     #   with:
     #     name: dist-${{ matrix.python-version }}
-    #     path: dist/
\ No newline at end of file
+    #     path: dist/
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 47771f3..1164ed6 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+0.5.3
+-----
+
+- Make sphinx a required dependency since there are imports from Sphinx
+  `#44 <https://github.com/jdillard/sphinx-llms-txt/pull/44>`_
+
 0.5.2
 -----
 
diff --git a/docs/source/contributing.rst b/docs/source/contributing.rst
index 44baf89..93efb64 100644
--- a/docs/source/contributing.rst
+++ b/docs/source/contributing.rst
@@ -19,7 +19,7 @@ Local development
 
    .. code-block:: console
 
-      pip install -e ".[dev]"
+      pip install -e . --group dev
 
 #. Install pre-commit Git hook scripts:
 
diff --git a/pyproject.toml b/pyproject.toml
index c3b7521..1d6f1c5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,13 +26,16 @@ classifiers = [
 license = {text = "MIT"}
 readme = "README.md"
 dynamic = ["version"]
+dependencies = [
+    "sphinx",
+]
 
 [project.urls]
 download = "https://pypi.org/project/sphinx-llms-txt/"
 source = "https://github.com/jdillard/sphinx-llms-txt"
 changelog = "https://github.com/jdillard/sphinx-llms-txt/blob/master/CHANGELOG.rst"
 
-[project.optional-dependencies]
+[dependency-groups]
 dev = [
     "pytest>=7.0.0",
     "black",
@@ -40,7 +43,6 @@ dev = [
     "mypy",
     "isort",
     "pre-commit",
-    "sphinx",
 ]
 test = [
     "pytest>=7.0.0",
diff --git a/sphinx_llms_txt/__init__.py b/sphinx_llms_txt/__init__.py
index b96cc20..41b11bb 100644
--- a/sphinx_llms_txt/__init__.py
+++ b/sphinx_llms_txt/__init__.py
@@ -21,7 +21,7 @@ from .manager import LLMSFullManager
 from .processor import DocumentProcessor
 from .writer import FileWriter
 
-__version__ = "0.5.2"
+__version__ = "0.5.3"
 
 # Export classes needed by tests
 __all__ = [