diff --git a/Cargo.lock b/Cargo.lock
index 44e1534..0419581 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -71,7 +71,7 @@ checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
 
 [[package]]
 name = "bindle"
-version = "0.4.0"
+version = "0.4.1"
 dependencies = [
  "anyhow",
  "async-trait",
diff --git a/Cargo.toml b/Cargo.toml
index 2ce89c0..a5b185c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bindle"
-version = "0.4.0"
+version = "0.4.1"
 authors = [
     "Matt Butcher <matt.butcher@microsoft.com>",
     "Taylor Thomas <taylor.thomas@microsoft.com>"
diff --git a/docs/README.md b/docs/README.md
index 8675681..0eed66d 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -27,7 +27,7 @@ on Linux, MacOS, and Windows (in PowerShell):
 
 1. Download your desired version from [the releases
    page](https://github.com/deislabs/bindles/releases)
-1. Unpack it (`tar -xzf bindle-v0.4.0-linux-amd64.tar.gz`)
+1. Unpack it (`tar -xzf bindle-v0.4.1-linux-amd64.tar.gz`)
 1. Move the bindle and bindle CLIs to their desired
    destinations somewhere in your `$PATH` (e.g. `mv bindle bindle-server /usr/local/bin/` on Unix-like
    systems or `mv *.exe C:\Windows\system32\` on Windows)
@@ -38,7 +38,7 @@ find Bindle, check to make sure that your `$PATH` environment variable is set co
 #### Validating
 
 If you'd like to validate the download, checksums can be downloaded from
-https://bindle.blob.core.windows.net/releases/checksums-v0.4.0.txt
+https://bindle.blob.core.windows.net/releases/checksums-v0.4.1.txt
 
 ### From Canary Builds
 
diff --git a/docs/crate-readme.md b/docs/crate-readme.md
index e5d79c3..a8cd608 100644
--- a/docs/crate-readme.md
+++ b/docs/crate-readme.md
@@ -7,7 +7,7 @@ Bindle is an aggregate object storage system used for storing aggregate applicat
 Add the following to your `Cargo.toml` dependencies:
 
 ```toml
-bindle = "0.1"
+bindle = "0.4"
 ```
 
 ### Features
diff --git a/src/invoice/mod.rs b/src/invoice/mod.rs
index 7aa0e5e..f060d7b 100644
--- a/src/invoice/mod.rs
+++ b/src/invoice/mod.rs
@@ -49,7 +49,7 @@ pub type AnnotationMap = BTreeMap<String, String>;
 
 /// A sealed trait used to mark that an invoice has been signed. This trait cannot be implemented by
 /// consumers of the bindle crate
-pub trait Signed {
+pub trait Signed: sealed::Sealed {
     /// Consumes the object, returning the signed invoice
     fn signed(self) -> Invoice;
 }