diff --git a/Cargo.lock b/Cargo.lock
index c95317cc..de38a736 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 4
 
 [[package]]
 name = "blobby"
-version = "0.4.0-pre.0"
+version = "0.4.0-pre.1"
 
 [[package]]
 name = "block-buffer"
diff --git a/blobby/Cargo.toml b/blobby/Cargo.toml
index 1a612c45..1c60c4e1 100644
--- a/blobby/Cargo.toml
+++ b/blobby/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "blobby"
-version = "0.4.0-pre.0"
+version = "0.4.0-pre.1"
 authors = ["RustCrypto Developers"]
 license = "MIT OR Apache-2.0"
 description = "Iterator over simple binary blob storage"