diff --git a/.gitignore b/.gitignore
index 4a62499..8477a5f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,3 +44,4 @@
 /adwaita-icon-theme-3.37.2.tar.xz
 /adwaita-icon-theme-3.37.92.tar.xz
 /adwaita-icon-theme-3.38.0.tar.xz
+/adwaita-icon-theme-40.rc.tar.xz
diff --git a/adwaita-icon-theme.spec b/adwaita-icon-theme.spec
index 00f7630..7b69d2f 100644
--- a/adwaita-icon-theme.spec
+++ b/adwaita-icon-theme.spec
@@ -2,13 +2,13 @@
 %global bootstrap 0
 
 Name:           adwaita-icon-theme
-Version:        3.38.0
-Release:        2%{?dist}
+Version:        40.0~rc
+Release:        1%{?dist}
 Summary:        Adwaita icon theme
 
 License:        LGPLv3+ or CC-BY-SA
 URL:            http://www.gnome.org
-Source0:        http://download.gnome.org/sources/adwaita-icon-theme/3.38/%{name}-%{version}.tar.xz
+Source0:        http://download.gnome.org/sources/adwaita-icon-theme/40/%{name}-40.rc.tar.xz
 
 BuildArch:      noarch
 
@@ -40,7 +40,7 @@ The %{name}-devel package contains the pkgconfig file for
 developing applications that use %{name}.
 
 %prep
-%autosetup -p1
+%autosetup -p1 -n %{name}-40.rc
 
 %build
 %configure
@@ -86,6 +86,10 @@ gtk-update-icon-cache --force %{_datadir}/icons/Adwaita &>/dev/null || :
 %{_datadir}/pkgconfig/adwaita-icon-theme.pc
 
 %changelog
+* Wed Mar 17 2021 Bastien Nocera <bnocera@redhat.com> - 40.0~rc-1
++ adwaita-icon-theme-40.0~rc-1
+- Update to 40.rc
+
 * Mon Jan 25 2021 Fedora Release Engineering <releng@fedoraproject.org> - 3.38.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
 
diff --git a/sources b/sources
index b99df16..f545da7 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (adwaita-icon-theme-3.38.0.tar.xz) = 710f034ef80476a4e9d60bcb7ba604e340ac561aafc67400b2cee2aac4696bfaab8a7d69a289116f884cce9bad1f8b3a3e0aff77588ecb9262e7bf250740af13
+SHA512 (adwaita-icon-theme-40.rc.tar.xz) = f498b2e83ed7ed4e4cfc018571f57179019dcc242d09cc432fadb91e3e50b7a788ebbc38f4a0dfa2819248f8c89ccf8651955ca8e5b2eaf1458cf948f176ddc7