diff --git a/HISTORY.md b/HISTORY.md
index 4d67ba325..c74fb7b1f 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -20,6 +20,7 @@
 
 #### Documentation
 
+- Fix documentation conf for readthedocs deprecations ({pr}`485`)
 - Add novelty search with CMA-ES to sphere example ({pr}`478`, {pr}`482`)
 
 #### Improvements
diff --git a/docs/conf.py b/docs/conf.py
index e1d9b6570..3a1fbcf9f 100755
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -29,6 +29,9 @@
 sys.path.insert(0, os.path.abspath(".."))  # Detect ribs.
 sys.path.append(os.path.abspath("./_ext"))  # Detect extensions.
 
+# Set canonical URL from the Read the Docs Domain
+html_baseurl = os.environ.get("READTHEDOCS_CANONICAL_URL", "")
+
 DEV_MODE = os.environ.get("DOCS_MODE", "regular") == "dev"
 READTHEDOCS_VERSION = os.environ.get("READTHEDOCS_VERSION", "stable")
 READTHEDOCS_LANGUAGE = os.environ.get("READTHEDOCS_LANGUAGE", "en")
@@ -136,6 +139,10 @@
 html_title = (f"pyribs (stable - v{version})" if READTHEDOCS_VERSION == "stable"
               else f"pyribs ({READTHEDOCS_VERSION})")
 
+# Tell Jinja2 templates the build is running on Read the Docs
+if os.environ.get("READTHEDOCS", "") == "True":
+    html_context["READTHEDOCS"] = True
+
 # material theme options (see theme.conf for more information)
 html_theme_options = {
     "nav_title": "pyribs",