diff --git a/Cargo.toml b/Cargo.toml
index a9317ad..18741cd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "rb"
 description = "A thread-safe ring buffer with blocking IO"
 keywords = ["IO", "audio", "ring-buffer", "circular-buffer"]
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Andreas Linz <klingt.net@gmail.com>"]
 documentation = "https://docs.rs/rb"
 repository = "https://github.com/klingtnet/rb"