diff --git a/.gitignore b/.gitignore
index e8e7a65..3ea8faa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,3 +64,4 @@ gnome-devel-docs-2.30.1.tar.bz2
 /gnome-devel-docs-3.38.0.tar.xz
 /gnome-devel-docs-3.38.1.tar.xz
 /gnome-devel-docs-3.38.2.tar.xz
+/gnome-devel-docs-40.beta.tar.xz
diff --git a/gnome-devel-docs.spec b/gnome-devel-docs.spec
index 29e500a..77e2695 100644
--- a/gnome-devel-docs.spec
+++ b/gnome-devel-docs.spec
@@ -1,13 +1,15 @@
+%global tarball_version %%(echo %{version} | tr '~' '.')
+
 Name: gnome-devel-docs
-Version: 3.38.2
-Release: 2%{?dist}
+Version: 40~beta
+Release: 1%{?dist}
 Summary: GNOME developer documentation
 
 # accessibility-devel-guide and optimization-guide are under the GFDL, other
 # documents are under CC-BY-SA.
 License: GFDL and CC-BY-SA
 URL: https://developer.gnome.org
-Source0: https://download.gnome.org/sources/%{name}/3.38/%{name}-%{version}.tar.xz
+Source0: https://download.gnome.org/sources/%{name}/40/%{name}-%{tarball_version}.tar.xz
 
 BuildArch: noarch
 BuildRequires: docbook-utils
@@ -22,7 +24,7 @@ It contains, e.g., the Human Interface Guidelines, the Integration Guide
 and the Platform Overview.
 
 %prep
-%setup -q
+%autosetup -p1 -n %{name}-%{tarball_version}
 
 %build
 %configure
@@ -39,6 +41,9 @@ make %{?_smp_mflags}
 %license COPYING COPYING.GFDL
 
 %changelog
+* Thu Feb 18 2021 Kalev Lember <klember@redhat.com> - 40~beta-1
+- Update to 40.beta
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 3.38.2-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
 
diff --git a/sources b/sources
index f0f69e2..f4b00d6 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (gnome-devel-docs-3.38.2.tar.xz) = 9d16adb7922505b39cda8bc1d10e2d42acea2396a0136c752a13d4adccbaec17a304734c54516cdc25fc61c377f497e31c977b28e7a7353489cea4f365aa3c64
+SHA512 (gnome-devel-docs-40.beta.tar.xz) = cab13dd9f7bcb707d5e17479d86f95808b83b2356845b74fae6901caf4ef6f1ab5c046824ea66fddc3bab5fc9f9827c58bb76602e0e968355c4163848be7127b