diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index eea381d..36b46d6 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -6,12 +6,13 @@ build:
     python: "3.13"
   jobs:
     pre_build:
-      - "sed -i '/local_extensions:/,/^[^ ]/d' book/config.yml"
+      - "sed -i '/local_extensions:/,/^[^ ]/d' book/_config.yml"
       - "jupyter-book config sphinx book/"
 
 python:
   install:
     - requirements: requirements.txt
+    - standard-imghdr
 
 sphinx:
   builder: html