diff --git a/Cargo.toml b/Cargo.toml
index a42c073..1844c01 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
 name = "secret-service"
 repository = "https://github.com/hwchen/secret-service-rs.git"
 edition = "2021"
-version = "3.1.0"
+version = "4.0.0"
 rust-version = "1.75.0"
 
 # The async runtime features mirror those of `zbus` for compatibility.