diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644
index 0000000000..c0c139b7e8
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,18 @@
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+sphinx:
+  builder: html
+  configuration: docs/conf.py
+
+formats:
+  - pdf
+  - epub
+
+python:
+  install:
+    - requirements: docs/requirements.txt
diff --git a/docs/ext/remix_code_links.py b/docs/ext/remix_code_links.py
index 31a5667689..55fc0ef5c2 100644
--- a/docs/ext/remix_code_links.py
+++ b/docs/ext/remix_code_links.py
@@ -27,10 +27,10 @@ def remix_code_url(source_code, language, solidity_version):
 
 def build_remix_link_node(url):
     reference_node = docutils.nodes.reference('', 'open in Remix', internal=False, refuri=url, target='_blank')
-    reference_node.set_class('remix-link')
+    reference_node['classes'].append('remix-link')
 
     paragraph_node = docutils.nodes.paragraph()
-    paragraph_node.set_class('remix-link-container')
+    paragraph_node['classes'].append('remix-link-container')
     paragraph_node.append(reference_node)
     return paragraph_node