diff --git a/pyproject.toml b/pyproject.toml
index 39b731e..f75b802 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ include = [
 [tool.poetry.dependencies]
 python = "^3.8.1"
 typing-extensions = "^4.6.2"
+numpy = "^1.20.0"
 uvicorn = { version = "^0.22.0", optional = true }
 fastapi = { version = "^0.95.0", optional = true }
 sse-starlette = { version = "^1.3.3", optional = true }