diff --git a/readthedocs.yml b/readthedocs.yml
index 16d77e0..34f39f7 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -1,6 +1,6 @@
 version: 2
 
 build:
-  os: ubuntu-22.04
+  os: "ubuntu-22.04"
   tools:
     python: "3.8"
\ No newline at end of file