diff --git a/.idea/fake_vcf.iml b/.idea/fake_vcf.iml
index 4a74969..0e08257 100644
--- a/.idea/fake_vcf.iml
+++ b/.idea/fake_vcf.iml
@@ -4,7 +4,7 @@
     <content url="file://$MODULE_DIR$">
       <excludeFolder url="file://$MODULE_DIR$/.mypy_cache" />
     </content>
-    <orderEntry type="jdk" jdkName="Poetry (fake_vcf)" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Poetry (fake_vcf) (2)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
   <component name="PyDocumentationSettings">
diff --git a/.idea/misc.xml b/.idea/misc.xml
index c739f68..91bb01a 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -3,5 +3,5 @@
   <component name="Black">
     <option name="sdkName" value="Poetry (fake_vcf)" />
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Poetry (fake_vcf)" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Poetry (fake_vcf) (2)" project-jdk-type="Python SDK" />
 </project>
diff --git a/.idea/poetry.xml b/.idea/poetry.xml
new file mode 100644
index 0000000..50cae1e
--- /dev/null
+++ b/.idea/poetry.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PoetryConfigService">
+    <option name="poetryVirtualenvPaths">
+      <set>
+        <option value="$USER_HOME$/Library/Caches/pypoetry/virtualenvs/fake-vcf-HBNHMKcy-py3.11/bin/python" />
+      </set>
+    </option>
+  </component>
+</project>
diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000..d0c3cbf
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = source
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/conf.py b/docs/conf.py
index 8acf0ba..7d629fd 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -13,14 +13,26 @@
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
-extensions = []
+extensions = [
+    "sphinx.ext.duration",
+    "sphinx.ext.doctest",
+    "sphinx.ext.autodoc",
+    "sphinx.ext.autosummary",
+    "sphinx.ext.intersphinx",
+]
+
 
 templates_path = ["_templates"]
 exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3/", None),
+    "sphinx": ("https://www.sphinx-doc.org/en/master/", None),
+}
+intersphinx_disabled_domains = ["std"]
 
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
-html_theme = "alabaster"
+html_theme = "sphinx_rtd_theme"
 html_static_path = ["_static"]
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 53fc1f3..c625976 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,2 @@
-sphinx==7.1.2
-sphinx-rtd-theme==1.3.0rc1
+sphinx==7.2.6
+sphinx-rtd-theme==1.3.0