diff --git a/docs/source/_static/stsci_pri_combo_mark_white.png b/docs/source/_static/stsci_pri_combo_mark_white.png
new file mode 100644
index 00000000..8fc1f5af
Binary files /dev/null and b/docs/source/_static/stsci_pri_combo_mark_white.png differ
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 3cdd6d08..877b4cfa 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,8 +1,6 @@
 import importlib
 import sys
 
-import stsci_rtd_theme
-
 if sys.version_info < (3, 11):
     import tomli as tomllib
 else:
@@ -12,13 +10,6 @@
 from pathlib import Path
 
 
-def setup(app):
-    try:
-        app.add_css_file("stsci.css")
-    except AttributeError:
-        app.add_stylesheet("stsci.css")
-
-
 REPO_ROOT = Path(__file__).parent.parent.parent
 
 # Modules that automodapi will document need to be available
@@ -43,17 +34,18 @@ def setup(app):
 extensions = [
     "sphinx_automodapi.automodapi",
     "numpydoc",
+    "sphinx.ext.intersphinx",
 ]
 
 autosummary_generate = True
 numpydoc_show_class_members = False
 autoclass_content = "both"
 
-html_theme = "stsci_rtd_theme"
+html_theme = "sphinx_rtd_theme"
+html_logo = "_static/stsci_pri_combo_mark_white.png"
 html_theme_options = {
     "collapse_navigation": True,
 }
-html_theme_path = [stsci_rtd_theme.get_html_theme_path()]
 html_domain_indices = True
 html_sidebars = {"**": ["globaltoc.html", "relations.html", "searchbox.html"]}
 html_use_index = True
@@ -62,3 +54,6 @@ def setup(app):
 # resolve.
 nitpicky = True
 nitpick_ignore = []
+
+intersphinx_mapping = {}
+intersphinx_mapping["python"] = ("https://docs.python.org/3", None)
diff --git a/pyproject.toml b/pyproject.toml
index b5386d32..44ac4cab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,6 @@ docs = [
     "sphinx",
     "sphinx-automodapi",
     "sphinx-rtd-theme",
-    "stsci-rtd-theme",
     "tomli; python_version <\"3.11\"",
 ]
 test = [