diff --git a/.gitignore b/.gitignore
index 055f71e..b610b5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /golang-github-restic-chunker-0.2.0.tar.gz
 /chunker-0.2.0.tar.gz
 /chunker-0.3.0.tar.gz
+/chunker-0.4.0.tar.gz
diff --git a/golang-github-restic-chunker.spec b/golang-github-restic-chunker.spec
index ccaad79..f166c28 100644
--- a/golang-github-restic-chunker.spec
+++ b/golang-github-restic-chunker.spec
@@ -3,7 +3,7 @@
 
 # https://github.com/restic/chunker
 %global goipath         github.com/restic/chunker
-Version:                0.3.0
+Version:                0.4.0
 
 %gometa
 
@@ -15,7 +15,7 @@ rolling Rabin Hash. The library is part of the restic backup program.}
 %global godocs          README.md
 
 Name:           %{goname}
-Release:        2%{?dist}
+Release:        1%{?dist}
 Summary:        Implementation of Content Defined Chunking (CDC) in Go
 
 # Upstream license specification: BSD-2-Clause
@@ -42,6 +42,9 @@ Source0:        %{gosource}
 %gopkgfiles
 
 %changelog
+* Sat Aug 01 19:36:49 CEST 2020 Robert-André Mauchin <zebob.m@gmail.com> - 0.4.0-1
+- Update to 0.4.0
+
 * Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.3.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
 
diff --git a/sources b/sources
index f6c4d3b..45e60f7 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (chunker-0.3.0.tar.gz) = 959d45c2c121b20c80fce7c0c4302b777834744cc3f1cf3adbf8659a9316966ea9074a0fe332e43e56bf55c6055dd0ed65acd6a911977b92a6afd3bf94c7d546
+SHA512 (chunker-0.4.0.tar.gz) = f193d090a98d68f376109d580a458c3c86cc442bc7ebe704afac8a1eefe165c06de6d5511d560827d04b6e4ce8a3a913d0d5b4a634a12e6820cb14e998cb9a16