diff --git a/CHANGELOG.md b/CHANGELOG.md
index c1fc8635..2569b924 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]:
+
+## [0.4.0]:
 - [Breaking change] Rename `Hlist!` type macro to `HList!` (https://github.com/lloydmeta/frunk/issues/132)
 - [Breaking change] Remove deprecated `HList.length()` (https://github.com/lloydmeta/frunk/issues/125)
 - [Breaking change] `HFoldRightable` rework: now `HFoldRightable::foldr` does not differ from `HFoldLeftable::foldl` in **calling**, like `std::iter::DoubleEndedIterator::rfold` does not differ from `std::iter::Iterator::fold`. Note: though `foldr` **behavior** wasn't changed, all old `foldr` calls would either stop compiling or produce wrong results (https://github.com/lloydmeta/frunk/issues/171)
diff --git a/Cargo.toml b/Cargo.toml
index 53562ef9..ce9c5f3b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "frunk"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Lloyd <lloydmeta@gmail.com>"]
 description = "Frunk provides developers with a number of functional programming tools like HList, Coproduct, Generic, LabelledGeneric, Validated, Monoid, Semigroup and friends."
 license = "MIT"
@@ -18,23 +18,23 @@ time = "0.1.36"
 [dependencies.frunk_core]
 path = "core"
 default-features = false
-version = "0.3.2"
+version = "0.4.0"
 
 [dependencies.frunk_proc_macros]
 path = "proc-macros"
 default-features = false
 optional = true
-version = "0.0.5"
+version = "0.1.0"
 
 [dependencies.frunk_derives]
 path = "derives"
 default-features = false
-version = "0.3.2"
+version = "0.4.0"
 
 [dev-dependencies.frunk_laws]
 path = "laws"
 default-features = false
-version = "0.3.1"
+version = "0.4.0"
 
 [dependencies]
 serde = { version = "^1.0", optional = true, features = [ "derive" ] }
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 5f8413fe..52fc1500 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "frunk_core"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Lloyd <lloydmeta@gmail.com>"]
 description = "Frunk core provides developers with HList, Coproduct, LabelledGeneric and Generic"
 license = "MIT"
@@ -21,14 +21,14 @@ serde = { version = "^1.0", optional = true, features = [ "derive" ] }
 [dev-dependencies.frunk_derives]
 path = "../derives"
 default-features = false
-version = "0.3.2"
+version = "0.4.0"
 
 [dev-dependencies.frunk]
 path = ".."
 default-features = false
-version = "0.3.2"
+version = "0.4.0"
 
 [dev-dependencies.frunk_proc_macros]
 path = "../proc-macros"
 default-features = false
-version = "0.0.5"
+version = "0.1.0"
diff --git a/derives/Cargo.toml b/derives/Cargo.toml
index 5c808f22..679b4b83 100644
--- a/derives/Cargo.toml
+++ b/derives/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "frunk_derives"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Lloyd <lloydmeta@gmail.com>"]
 description = "frunk_derives contains the custom derivations for certain traits in Frunk."
 license = "MIT"
@@ -21,4 +21,4 @@ quote = "1"
 [dependencies.frunk_proc_macro_helpers]
 path = "../proc-macro-helpers"
 default-features = false
-version = "0.0.5"
+version = "0.1.0"
diff --git a/laws/Cargo.toml b/laws/Cargo.toml
index eaebf690..ff8cb2e1 100644
--- a/laws/Cargo.toml
+++ b/laws/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "frunk_laws"
-version = "0.3.2"
+version = "0.4.0"
 authors = ["Lloyd <lloydmeta@gmail.com>"]
 description = "frunk_laws contains laws for algebras declared in Frunk."
 license = "MIT"
@@ -14,7 +14,7 @@ travis-ci = { repository = "lloydmeta/frunk" }
 [dependencies.frunk]
 path = ".."
 default-features = false
-version = "0.3.2"
+version = "0.4.0"
 
 [dependencies]
 quickcheck = "0.6.1"
diff --git a/proc-macro-helpers/Cargo.toml b/proc-macro-helpers/Cargo.toml
index 5a824e88..1203f0f8 100644
--- a/proc-macro-helpers/Cargo.toml
+++ b/proc-macro-helpers/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "frunk_proc_macro_helpers"
-version = "0.0.5"
+version = "0.1.0"
 authors = ["Lloyd <lloydmeta@gmail.com>"]
 description = "Common internal functions for frunk's proc macros"
 license = "MIT"
@@ -19,4 +19,4 @@ proc-macro2 = "1"
 [dependencies.frunk_core]
 path = "../core"
 default-features = false
-version = "0.3.2"
+version = "0.4.0"
diff --git a/proc-macros-impl/Cargo.toml b/proc-macros-impl/Cargo.toml
index 959125af..9db77b5a 100644
--- a/proc-macros-impl/Cargo.toml
+++ b/proc-macros-impl/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "frunk_proc_macros_impl"
-version = "0.0.5"
+version = "0.1.0"
 authors = ["Lloyd <lloydmeta@gmail.com>"]
 description = "Proc macros inernal implementations for Frunk"
 license = "MIT"
@@ -23,9 +23,9 @@ proc-macro = true
 [dependencies.frunk_core]
 path = "../core"
 default-features = false
-version = "0.3.2"
+version = "0.4.0"
 
 [dependencies.frunk_proc_macro_helpers]
 path = "../proc-macro-helpers"
 default-features = false
-version = "0.0.5"
+version = "0.1.0"
diff --git a/proc-macros/Cargo.toml b/proc-macros/Cargo.toml
index 2c6a1e6e..71cf5276 100644
--- a/proc-macros/Cargo.toml
+++ b/proc-macros/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "frunk_proc_macros"
-version = "0.0.5"
+version = "0.1.0"
 authors = ["Lloyd <lloydmeta@gmail.com>"]
 description = "Proc macros for Frunk"
 license = "MIT"
@@ -17,14 +17,14 @@ version = "0.5"
 [dependencies.frunk_core]
 path = "../core"
 default-features = false
-version = "0.3.2"
+version = "0.4.0"
 
 [dependencies.frunk_proc_macros_impl]
 path = "../proc-macros-impl"
 default-features = false
-version = "0.0.5"
+version = "0.1.0"
 
 [dev-dependencies.frunk]
 path = "../."
 default-features = false
-version = "0.3.2"
+version = "0.4.0"