diff --git a/pyproject.toml b/pyproject.toml
index 5f03c44..3ab9f4e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ license = {file = "LICENSE.txt"}
 maintainers = [
     {name = "Natural Capital Project Software Team"}
 ]
-keywords = "parallel multiprocessing distributed computing"
+keywords = ["parallel", "multiprocessing", "distributed", "computing"]
 classifiers = [
     "Intended Audience :: Developers",
     "Topic :: System :: Distributed Computing",