diff --git a/Cargo.toml b/Cargo.toml
index 2e6f238..4047dd0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,9 @@ name = "soft-serial"
 version = "0.1.0"
 edition = "2021"
 
+[dependencies.ring-buffer]
+git = "https://gitea.doryan04.ru/doryan/ring-buffer"
+
 [dependencies.arduino-hal]
 git = "https://github.com/rahix/avr-hal"
 rev = "3e362624547462928a219c40f9ea8e3a64f21e5f"
@@ -12,6 +15,7 @@ git = "https://gitea.doryan04.ru/TheEmbeddedRust/static-pins"
 
 [features]
 sparkfun-promicro = ["arduino-hal/sparkfun-promicro", "static-pins/sparkfun-promicro"]
+ring-buffer = ["dep:ring-buffer"]
 
 [dependencies.avr-device]
 version = "0.5.4"