diff --git a/pyproject.toml b/pyproject.toml
index 124a99bd..f39785c7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -47,7 +47,7 @@ docs = [
 
 [tool.setuptools.packages.find]
 where = ["."]
-include = ["femwell*]
+include = ["femwell*"]
 
 [project.urls]
 Homepage = "https://github.com/HelgeGehring/femwell"