diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index b8afe41..f05d4be 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,9 +7,9 @@ version: 2
 
 # Set the version of Python and other tools you might need
 build:
-  #os: ubuntu-20.04
+  os: ubuntu-20.04
   tools:
-    python: 2.7
+    python: "2.7"
     # You can also specify other tool versions:
     # nodejs: "16"
     # rust: "1.55"
@@ -25,5 +25,6 @@ sphinx:
 
 # Optionally declare the Python requirements required to build your docs
 python:
-   install:
-   - requirements: requirements.txt
+  version: 2.7
+  install:
+    - requirements: docs/requirements.txt