diff --git a/Cargo.toml b/Cargo.toml
index ffd4688..75f7cbc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -44,3 +44,6 @@ repository = "https://github.com/Boshen/unicode-id"
 bench = []
 default = []
 no_std = []
+
+[dev-dependencies]
+criterion = "0.5"