diff --git a/.readthedocs.yml b/.readthedocs.yml
index 34263e9..5786f06 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -11,7 +11,7 @@ sphinx:
 
 python:
   install:
-    - requirements: doc/requirements.py
+    - requirements: doc/requirements.txt
     - method: pip
       path: .
   system_packages: true