diff --git a/.bumpversion.toml b/.bumpversion.toml
index bcd6058..a3f7240 100644
--- a/.bumpversion.toml
+++ b/.bumpversion.toml
@@ -1,5 +1,5 @@
 [tool.bumpversion]
-current_version = "0.3.0"
+current_version = "0.4.0"
 parse = "(?P<major>\\d+)\\.(?P<minor>\\d+)\\.(?P<patch>\\d+)"
 serialize = ["{major}.{minor}.{patch}"]
 search = "{current_version}"
diff --git a/gen/dotnet/Utxorpc.Spec.csproj b/gen/dotnet/Utxorpc.Spec.csproj
index 80d8b79..4668b73 100644
--- a/gen/dotnet/Utxorpc.Spec.csproj
+++ b/gen/dotnet/Utxorpc.Spec.csproj
@@ -5,7 +5,7 @@
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <PackageId>Utxorpc.Spec</PackageId>
-        <Version>0.3.0-alpha</Version>
+        <Version>0.4.0-alpha</Version>
         <Authors>clark@txpipe.io</Authors>
         <Company>TxPipe LLC</Company>
         <PackageDescription>
diff --git a/gen/haskell/utxorpc.cabal b/gen/haskell/utxorpc.cabal
index 2940a22..9bdfcfc 100644
--- a/gen/haskell/utxorpc.cabal
+++ b/gen/haskell/utxorpc.cabal
@@ -1,7 +1,7 @@
 cabal-version: 3.0
 
 name:           utxorpc
-version:        0.0.3.0
+version:        0.0.4.0
 synopsis:       A gRPC interface for UTxO Blockchains
 description:    UTxO RPC (u5c for short) is an interface tailored for interactions with UTxO-based blockchains, prioritizing performance and developer experience. By providing a common contract, a range of SDKs, and thorough documentation, UTxO RPC aims to facilitate:
 
diff --git a/gen/node/package.json b/gen/node/package.json
index 908551f..8663ce9 100644
--- a/gen/node/package.json
+++ b/gen/node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@utxorpc/spec",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "UTxO RPC auto-generated spec types & stubs",
   "main": "./lib/index.js",
   "types": "./lib/index.d.ts",
diff --git a/gen/rust/Cargo.toml b/gen/rust/Cargo.toml
index d97fead..d4b1d7e 100644
--- a/gen/rust/Cargo.toml
+++ b/gen/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "utxorpc-spec"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 description = "Auto-generated structs for the UTxO RPC spec"
 repository = "https://github.com/utxorpc/spec"