diff --git a/.gitignore b/.gitignore
index f9e69c9..0ff9676 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /number_prefix-0.2.7.crate
 /number_prefix-0.2.8.crate
 /number_prefix-0.3.0.crate
+/number_prefix-0.4.0.crate
diff --git a/rust-number_prefix.spec b/rust-number_prefix.spec
index 6a94cb3..74fc1e1 100644
--- a/rust-number_prefix.spec
+++ b/rust-number_prefix.spec
@@ -1,15 +1,16 @@
-# Generated by rust2rpm 10
+# Generated by rust2rpm 18
 %bcond_without check
 %global debug_package %{nil}
 
 %global crate number_prefix
 
 Name:           rust-%{crate}
-Version:        0.3.0
-Release:        7%{?dist}
-Summary:        Library for formatting numeric prefixes: kilo, giga, kibi
+Version:        0.4.0
+Release:        1%{?dist}
+Summary:        Library for numeric prefixes (kilo, giga, kibi)
 
 # Upstream license specification: MIT
+# https://github.com/ogham/rust-number-prefix/pull/8
 License:        MIT
 URL:            https://crates.io/crates/number_prefix
 Source:         %{crates_source}
@@ -22,7 +23,7 @@ BuildArch:      noarch
 BuildRequires:  rust-packaging
 
 %global _description %{expand:
-Library for formatting numeric prefixes: kilo, giga, kibi.}
+Library for numeric prefixes (kilo, giga, kibi).}
 
 %description %{_description}
 
@@ -36,9 +37,7 @@ This package contains library source intended for building other packages
 which use "%{crate}" crate.
 
 %files          devel
-%license LICENCE
-%doc README.md
-%{cargo_registry}/%{crate}-%{version}/
+%{cargo_registry}/%{crate}-%{version_no_tilde}/
 
 %package     -n %{name}+default-devel
 Summary:        %{summary}
@@ -50,7 +49,7 @@ This package contains library source intended for building other packages
 which use "default" feature of "%{crate}" crate.
 
 %files       -n %{name}+default-devel
-%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
 %package     -n %{name}+std-devel
 Summary:        %{summary}
@@ -62,7 +61,7 @@ This package contains library source intended for building other packages
 which use "std" feature of "%{crate}" crate.
 
 %files       -n %{name}+std-devel
-%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
 %prep
 %autosetup -n %{crate}-%{version_no_tilde} -p1
@@ -83,6 +82,9 @@ which use "std" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Tue Jul 20 2021 Fabio Valentini <decathorpe@gmail.com> - 0.4.0-1
+- Update to version 0.4.0.
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.3.0-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
 
diff --git a/sources b/sources
index 25f7f8b..6a76430 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (number_prefix-0.3.0.crate) = 014c37c477b1c99c20461dfa6deb1692d93f10c592387bdb757d9220347ec7bfce5861e82029286cf3a64e9d53427cbfc40549e358c3fbaaebeb73e91b598107
+SHA512 (number_prefix-0.4.0.crate) = a43b668d7314218b86ca7451daa9dfef71f6c9f6616bc34c12d94ae6030f182bcca9da83905cb46f3d49d0aa81385a787e92e4f3ae239658067adc249f8174df