diff --git a/pyproject.toml b/pyproject.toml
index 6ea094a..a037369 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,7 +53,7 @@ mkdocs-git-authors-plugin = ">=0.7.2,<0.9.0"
 mkdocs-git-revision-date-localized-plugin = "^1.2.2"
 
 [build-system]
-requires = "poetry-core"
+requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.pytest.ini_options]