diff --git a/.readthedocs.yml b/.readthedocs.yml
index 50bf5df..08db6e2 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -10,6 +10,6 @@ build:
     post_create_environment:
       - pip install poetry 
     post_install:
-      -VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH poetry install --with dev
+      - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH poetry install --with dev
 sphinx:
   configuration: docs/source/conf.py