diff --git a/docs/pyproject.toml b/docs/pyproject.toml
index c576081a4..a08d03f6f 100644
--- a/docs/pyproject.toml
+++ b/docs/pyproject.toml
@@ -23,5 +23,5 @@ django-environ = "==0.10.0"
 sphinx-autobuild = "2021.3.14"
 
 [build-system]
-requires = ["poetry-core>=1.0.0"]
+requires = ["poetry-core==1.8.1"]
 build-backend = "poetry.core.masonry.api"