diff --git a/pbjson-build/Cargo.toml b/pbjson-build/Cargo.toml
index 2b41346..f3ab19d 100644
--- a/pbjson-build/Cargo.toml
+++ b/pbjson-build/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pbjson-build"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Raphael Taylor-Davies <r.taylordavies@googlemail.com>"]
 edition = "2021"
 description = "Generates Serialize and Deserialize implementations for prost message types"
diff --git a/pbjson-test/Cargo.toml b/pbjson-test/Cargo.toml
index a60b102..216e068 100644
--- a/pbjson-test/Cargo.toml
+++ b/pbjson-test/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pbjson-test"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Raphael Taylor-Davies <r.taylordavies@googlemail.com>"]
 edition = "2021"
 description = "Test resources for pbjson converion"
diff --git a/pbjson-types/Cargo.toml b/pbjson-types/Cargo.toml
index dd511d3..6811d66 100644
--- a/pbjson-types/Cargo.toml
+++ b/pbjson-types/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pbjson-types"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Raphael Taylor-Davies <r.taylordavies@googlemail.com>"]
 description = "Protobuf well known types with serde serialization support"
 edition = "2021"
@@ -12,7 +12,7 @@ repository = "https://github.com/influxdata/pbjson"
 [dependencies] # In alphabetical order
 bytes = "1.0"
 chrono = { version = "0.4", default-features = false, features = ["alloc"] }
-pbjson = { path = "../pbjson", version = "0.3" }
+pbjson = { path = "../pbjson", version = "0.4" }
 prost = "0.11"
 serde = { version = "1.0", features = ["derive"] }
 
@@ -21,4 +21,4 @@ serde_json = "1.0"
 
 [build-dependencies] # In alphabetical order
 prost-build = "0.11"
-pbjson-build = { path = "../pbjson-build", version = "0.3" }
+pbjson-build = { path = "../pbjson-build", version = "0.4" }
diff --git a/pbjson/Cargo.toml b/pbjson/Cargo.toml
index f869eb5..9d21982 100644
--- a/pbjson/Cargo.toml
+++ b/pbjson/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pbjson"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Raphael Taylor-Davies <r.taylordavies@googlemail.com>"]
 edition = "2021"
 description = "Utilities for pbjson conversion"