diff --git a/Cargo.lock b/Cargo.lock
index 40f0efc..89a414d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -395,7 +395,7 @@ checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"
 
 [[package]]
 name = "function-sdk-rust"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "bytes",
  "clap",
diff --git a/sdk/Cargo.toml b/sdk/Cargo.toml
index 8240015..4e63569 100644
--- a/sdk/Cargo.toml
+++ b/sdk/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "function-sdk-rust"
-version = "0.3.1"
+version = "0.4.0"
 edition.workspace = true
 license.workspace = true
 description = "A Rust SDK for writing Crossplane composition functions"