diff --git a/docs/conf.py b/docs/conf.py
index a6bf9de..4623f49 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -35,8 +35,11 @@
     "sphinx.ext.intersphinx",
     "sphinx.ext.napoleon",
     "sphinx.ext.viewcode",
+    "sphinx_rtd_theme",
 ]
 
+html_theme = "sphinx_rtd_theme"
+
 add_module_names = False
 
 autodoc_member_order = "bysource"
diff --git a/pyproject.toml b/pyproject.toml
index 1dca056..24b5792 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,7 +67,8 @@ dependencies = [
 [project.optional-dependencies]
 
 docs = [
-    "sphinx"
+    "sphinx",
+    "sphinx-rtd-theme",
 ]
 testing = [
     "pytest",