diff --git a/pyproject.toml b/pyproject.toml
index 38b700f0..964811f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,6 +32,7 @@ datasette-sqlite-regex = "^0.2.3"
 pysqlite3 = "^0.5.1"
 sqlite-regex = "^0.2.3"
 datasette-publish-vercel = "^0.14.2"
+numpy = "^1.25.2"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.4.0"