diff --git a/CHANGELOG.md b/CHANGELOG.md
index 178ee705..aca1e294 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,11 @@ All notable changes to this project will be documented in this file.
 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
+## [0.4.1] - 2018-08-20
+
+### Fixed
+
+ * Fixed compilation on nightly since `use_extern_macros` was stabilized
 
 ### Changed
 
@@ -143,7 +147,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 * Initial release
 
-[0.4.0]: https://github.com/olivierlacan/keep-a-changelog/compare/v0.3.2...v0.4.0
+[0.4.1]: https://github.com/pyo3/pyo3/compare/v0.4.0...v0.4.1
+[0.4.0]: https://github.com/pyo3/pyo3/compare/v0.3.2...v0.4.0
 [0.3.2]: https://github.com/pyo3/pyo3/compare/v0.3.1...v0.3.2
 [0.3.1]: https://github.com/pyo3/pyo3/compare/v0.3.0...v0.3.1
 [0.3.0]: https://github.com/pyo3/pyo3/compare/v0.2.7...v0.3.0
diff --git a/Cargo.toml b/Cargo.toml
index 535193b7..c6cd5141 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyo3"
-version = "0.4.0"
+version = "0.4.1"
 description = "Bindings to Python interpreter"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 readme = "README.md"
@@ -19,10 +19,10 @@ appveyor = { repository = "fafhrd91/pyo3" }
 codecov = { repository = "PyO3/pyo3", branch = "master", service = "github" }
 
 [dependencies]
-libc = "0.2.42"
+libc = "0.2.43"
 spin = "0.4.9"
 num-traits = "0.2.5"
-pyo3cls = { path = "pyo3cls", version = "0.4.0" }
+pyo3cls = { path = "pyo3cls", version = "=0.4.1" }
 mashup = "0.1.5"
 
 [dev-dependencies]
diff --git a/guide/src/function.md b/guide/src/function.md
index 1468d2bc..aa9dee72 100644
--- a/guide/src/function.md
+++ b/guide/src/function.md
@@ -34,7 +34,7 @@ as first parameter, the function name as second and an instance of `Python`
 as third.
 
 ```rust
-#![feature(specialization, use_extern_macros)]
+#![feature(specialization)]
 
 #[macro_use]
 extern crate pyo3;
diff --git a/pyo3-derive-backend/Cargo.toml b/pyo3-derive-backend/Cargo.toml
index a18b7186..38de02cc 100644
--- a/pyo3-derive-backend/Cargo.toml
+++ b/pyo3-derive-backend/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyo3-derive-backend"
-version = "0.4.0"
+version = "0.4.1"
 description = "Code generation for PyO3 package"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 keywords = ["pyo3", "python", "cpython", "ffi"]
@@ -11,13 +11,10 @@ categories = ["api-bindings", "development-tools::ffi"]
 license = "Apache-2.0"
 
 [dependencies]
-log= "0.4.3"
-quote= "0.6.4"
-
-[dependencies.proc-macro2]
-version = "0.4.9"
-features = ["nightly"]
+log = "0.4.4"
+quote = "0.6.6"
+proc-macro2 = "0.4.13"
 
 [dependencies.syn]
-version= "0.14.5"
-features=["full", "parsing", "printing", "extra-traits"]
+version = "0.14.8"
+features = ["full", "extra-traits"]
diff --git a/pyo3cls/Cargo.toml b/pyo3cls/Cargo.toml
index 05baba6a..5c46e1d7 100644
--- a/pyo3cls/Cargo.toml
+++ b/pyo3cls/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyo3cls"
-version = "0.4.0"
+version = "0.4.1"
 description = "Proc macros for PyO3 package"
 authors = ["PyO3 Project and Contributors <https://github.com/PyO3>"]
 keywords = ["pyo3", "python", "cpython", "ffi"]
@@ -14,16 +14,13 @@ license = "Apache-2.0"
 proc-macro = true
 
 [dependencies]
-quote= "0.6.4"
+quote= "0.6.6"
+proc-macro2 = "0.4.13"
 
 [dependencies.syn]
-version= "0.14.5"
-features=["full", "parsing", "printing", "extra-traits"]
+version= "0.14.8"
+features=["full", "extra-traits"]
 
 [dependencies.pyo3-derive-backend]
 path = "../pyo3-derive-backend"
-version = "0.4.0"
-
-[dependencies.proc-macro2]
-version = "0.4.9"
-features= ["nightly"]
+version = "=0.4.1"