diff --git a/Cargo.toml b/Cargo.toml
index 8ea941a7..ac82a09a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ homepage = "https://github.com/DaGenix/rust-crypto/"
 repository = "https://github.com/DaGenix/rust-crypto/"
 description = "A (mostly) pure-Rust implementation of various common cryptographic algorithms."
 keywords = [ "Crypto", "MD5", "Sha1", "Sha2", "AES" ]
+categories = ["cryptography"]
 readme = "README.md"
 build = "build.rs"