diff --git a/Cargo.toml b/Cargo.toml
index b7967fe..1f9a558 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ rust-version = "1.31"
 license = "Apache-2.0 OR MIT"
 repository = "https://github.com/taiki-e/const_fn"
 keywords = ["macros", "attribute", "const", "static"]
-categories = ["no-std", "rust-patterns"]
+categories = ["no-std", "no-std::no-alloc", "rust-patterns"]
 exclude = ["/.*", "/tools"]
 description = """
 A lightweight attribute for easy generation of const functions with conditional compilations.