diff --git a/Cargo.toml b/Cargo.toml
index b1621fb..5cc528b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,6 @@ keywords = [
     'authorization',
     'oauth',
     'openid',
-    'async',
     'uma2'
 ]
 license = 'Unlicense OR MIT'