From 0f24009e0ef8fe8b9c50b8c2dd0bce1c04e8c078 Mon Sep 17 00:00:00 2001
From: Lann <github-lann@lannbox.com>
Date: Wed, 13 May 2020 10:25:41 -0400
Subject: [PATCH] Document dependency specficiation extras

---
 docs/docs/dependency-specification.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/docs/dependency-specification.md b/docs/docs/dependency-specification.md
index f826332eb71..2a9110313ae 100644
--- a/docs/docs/dependency-specification.md
+++ b/docs/docs/dependency-specification.md
@@ -136,6 +136,17 @@ poetry add https://example.com/my-package-0.1.0.tar.gz
 ```
 
 
+## Dependency `extras`
+
+You can specify [PEP-508 Extras](https://www.python.org/dev/peps/pep-0508/#extras)
+for a dependency:
+
+```toml
+[tool.poetry.dependencies]
+gunicorn = { version = "^20.0", extras = ["gevent"] }
+```
+
+
 ## Python restricted dependencies
 
 You can also specify that a dependency should be installed only for specific Python versions: