diff --git a/Cargo.toml b/Cargo.toml
index 78b593e8..26e83888 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,6 @@
 [package]
 authors = ["Jimmy Cuadra <jimmy@jimmycuadra.com>"]
+categories = ["api-bindings", "cryptography"]
 description = "Digital signatures according to the Matrix specification."
 documentation = "https://docs.rs/ruma-signatures"
 edition = "2018"