diff --git a/pyproject.toml b/pyproject.toml
index a45e7b7e86e5e723b73e9163e4b7ca60b9ae2d07..802038aa71e52b592b30d391b61a620888befdbf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,6 +2,7 @@
 name = "requests-http-message-signatures"
 version = "0.3.0"
 description = ""
+license = "Apache-2.0"
 authors = ["Funkwhale Collective <maintainers@funkwhale.audio>"]
 
 [tool.poetry.dependencies]