diff --git a/url/Cargo.toml b/url/Cargo.toml
index 9001be1b..6f5532af 100644
--- a/url/Cargo.toml
+++ b/url/Cargo.toml
@@ -10,7 +10,7 @@ documentation = "https://docs.rs/url"
 repository = "https://github.com/servo/rust-url"
 readme = "../README.md"
 keywords = ["url", "parser"]
-categories = ["parser-implementations", "web-programming", "encoding", "no_std"]
+categories = ["parser-implementations", "web-programming", "encoding", "no-std"]
 license = "MIT OR Apache-2.0"
 include = ["src/**/*", "LICENSE-*", "README.md", "tests/**"]
 edition = "2018"