diff --git a/Cargo.toml b/Cargo.toml
index 05f94fa0d..2a922ed6d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ version = "0.2.15"
 license = "MIT/Apache-2.0"
 readme = "README.md"
 keywords = ["gzip", "flate", "zlib", "encoding"]
+categories = ["api-bindings"]
 repository = "/~https://github.com/alexcrichton/flate2-rs"
 homepage = "/~https://github.com/alexcrichton/flate2-rs"
 documentation = "http://alexcrichton.com/flate2-rs"