diff --git a/pyproject.toml b/pyproject.toml
index 0649dbf2..236806f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,7 @@ openai="^0.27.6"
 cookiecutter={version="^2.1.1", optional=true}
 tslumen={version="^0.0.1", optional=true}
 prophet={version="^1.1.3", optional=true}
-stumpy={version="^1.11.1, optional=true}
+stumpy={version="^1.11.1", optional=true}
 
 [tool.poetry.extras]
 duckdb = ["duckdb"]