diff --git a/pyproject.toml b/pyproject.toml
index 76d09cdb..538be9da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,10 @@ async-timeout = "^3.0.1"
 sentry-sdk = "^1.0.0"
 
 [tool.poetry.dev-dependencies]
+pytest = "^6.1.1"
+pytest-asyncio = "^0.15.0"
+sphinx = "^3.3.1"
+sphinx_rtd_theme = "^0.5.0"
 
 [build-system]
 requires = ["poetry>=0.12"]