diff --git a/.gitignore b/.gitignore
index 33a2347..39a290e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /nom-3.2.1.crate
+/nom-4.0.0.crate
diff --git a/nom-3.2.1-fix-metadata.diff b/nom-3.2.1-fix-metadata.diff
deleted file mode 100644
index 5390247..0000000
--- a/nom-3.2.1-fix-metadata.diff
+++ /dev/null
@@ -1,33 +0,0 @@
---- nom-3.2.1/Cargo.toml	1970-01-01T01:00:00+01:00
-+++ nom-3.2.1/Cargo.toml	2018-06-14T08:06:04.357807+02:00
-@@ -23,19 +23,15 @@
- license = "MIT"
- repository = "https://github.com/Geal/nom"
- [dependencies.memchr]
--version = "^1.0.1"
-+version = "^2"
- default-features = false
- 
--[dependencies.compiler_error]
--version = "0.1.1"
--optional = true
--
- [dependencies.regex]
--version = "^0.2"
-+version = "^1"
- optional = true
- 
- [dependencies.lazy_static]
--version = "^0.2.2"
-+version = "^1"
- optional = true
- 
- [features]
-@@ -43,7 +39,6 @@
- regexp = ["regex"]
- verbose-errors = []
- stream = []
--nightly = ["compiler_error"]
- regexp_macros = ["regexp", "lazy_static"]
- std = ["memchr/use_std"]
- [badges.travis-ci]
diff --git a/rust-nom.spec b/rust-nom.spec
index 279eff2..607f0d5 100644
--- a/rust-nom.spec
+++ b/rust-nom.spec
@@ -5,19 +5,13 @@
 %global crate nom
 
 Name:           rust-%{crate}
-Version:        3.2.1
-Release:        5%{?dist}
+Version:        4.0.0
+Release:        1%{?dist}
 Summary:        Byte-oriented, zero-copy, parser combinators library
 
 License:        MIT
 URL:            https://crates.io/crates/nom
 Source0:        https://crates.io/api/v1/crates/%{crate}/%{version}/download#/%{crate}-%{version}.crate
-# Initial patched metadata
-# * Bump memchr to 2, https://github.com/Geal/nom/commit/38830cb40888ca10975e6446e133a830fe8f9604
-# * compiler_error is nightly
-# * Bump lazy_static to 1, https://github.com/Geal/nom/pull/631
-# * Bump regex to 1, https://github.com/Geal/nom/commit/5b55b60b7e69391c8a9eed704c4aec9c197cdf8b
-Patch0:         nom-3.2.1-fix-metadata.diff
 
 ExclusiveArch:  %{rust_arches}
 
@@ -64,6 +58,9 @@ rm -vf tests/mp4.rs
 %{cargo_registry}/%{crate}-%{version}/
 
 %changelog
+* Thu Jun 14 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 4.0.0-1
+- Update to 4.0.0
+
 * Thu Jun 14 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 3.2.1-5
 - Bump regex to 1
 
diff --git a/sources b/sources
index 992161e..1c24262 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (nom-3.2.1.crate) = 2baf05e568c426eaa1560569538e0f08706e40333a797374bd3f897bcadfcf239c6dc9eaabb99e9ac72d8b79e46f12ade8b5d88b04ce10ef24e8b21513392c77
+SHA512 (nom-4.0.0.crate) = 02e8f9a418ea13622693291e544528629efdca7a595a0480423e7812148aa276ed7f557954be3a9d64454c660d9e3d327121501bf195888a9a900f06df19aede