diff --git a/hooks/utils/pyproject_file.py b/hooks/utils/pyproject_file.py
index 6288cc1..b39eac1 100644
--- a/hooks/utils/pyproject_file.py
+++ b/hooks/utils/pyproject_file.py
@@ -18,7 +18,11 @@ def __init__(self, path: str) -> None:
 
     @property
     def package_name(self) -> str:
-        return str(self.contents["tool"]["poetry"]["name"])
+        try:
+            name = str(self.contents["tool"]["poetry"]["name"])
+        except KeyError:
+            name = str(self.contents["project"]["name"])
+        return name
 
     def add_mypy_ignore(self, bad_imports):
         self.contents["tool"]["mypy"]["overrides"][0]["module"].extend(bad_imports)