diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 28296291..23eb5d3c 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,8 +7,8 @@ build:
   - libpango1.0-dev
   - ffmpeg
   jobs:
-    post_create_environment:
-    - pip install manim<0.18  # See: https://github.com/ManimCommunity/manim/issues/4104
+    post_install:
+    - pip install 'manim<0.18'  # See: https://github.com/ManimCommunity/manim/issues/4104
 sphinx:
   builder: html
   configuration: docs/source/conf.py