diff --git a/Cargo.toml b/Cargo.toml
index 0ced94d9..213f8f04 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ authors = [
 repository = "https://github.com/georust/proj"
 documentation = "https://docs.rs/proj/"
 keywords = ["proj", "projection", "osgeo", "geo"]
+categories = ["science::geo", "api-bindings"]
 license = "MIT OR Apache-2.0"
 readme = "README.md"
 edition = "2018"