diff --git a/Cargo.toml b/Cargo.toml
index 85b49833..1d63c54c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ description = "A modern Prolog implementation written mostly in Rust."
 readme = "README.md"
 repository = "https://github.com/mthom/scryer-prolog"
 license = "BSD-3-Clause"
-keywords = ["prolog", "prolog-interpreter", "prolog-implementation"]
+keywords = ["prolog", "prolog-interpreter", "prolog-system"]
 categories = ["command-line-utilities"]
 build = "build.rs"