diff --git a/.readthedocs.yml b/.readthedocs.yml
index 0169bcab4a..c1ac5fedfe 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -11,9 +11,6 @@ sphinx:
   configuration: doc/conf.py
   fail_on_warning: True
 
-formats:
-  - pdf
-
 python:
   install:
     - requirements: doc/rtd_requirements.txt