diff --git a/docs/conf.py b/docs/conf.py
index 110652fd..44df6da4 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,6 +1,8 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+import os
+
 from pkg_resources import DistributionNotFound, get_distribution
 
 try:
@@ -8,6 +10,10 @@
 except DistributionNotFound:
     __version__ = "unknown version"
 
+# Support canonical URL
+html_baseurl = os.environ.get("READTHEDOCS_CANONICAL_URL", "")
+if os.environ.get("READTHEDOCS", "") == "True":
+    html_context = {"READTHEDOCS": True}
 
 # General stuff
 extensions = [