added more keywords for crates.io
diff --git a/Cargo.toml b/Cargo.toml
index 1c77575..624238f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@
 documentation = "https://docs.rs/tuf"
 readme = "README.md"
 license = "MIT/Apache-2.0"
-keywords = [ "security" ]
+keywords = [ "security", "update", "repository" ]
 categories = [ "cryptography" ]
 
 [badges]