diff --git a/docs/conf.py b/docs/conf.py
index e6f995e..db9cdb8 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -27,12 +27,8 @@
     "issue": ("https://github.com/Vauxoo/pre-commit-vauxoo/issues/%s", "#"),
     "pr": ("https://github.com/Vauxoo/pre-commit-vauxoo/pull/%s", "PR #"),
 }
-# on_rtd is whether we are on readthedocs.org
-on_rtd = os.environ.get("READTHEDOCS", None) == "True"
-
-if not on_rtd:  # only set the theme if we're building docs locally
-    html_theme = "sphinx_rtd_theme"
 
+html_theme = "sphinx_rtd_theme"
 html_use_smartypants = True
 html_last_updated_fmt = "%b %d, %Y"
 html_split_index = False