diff --git a/siril-0.99.10.1.tar.bz2 b/siril-0.99.10.1.tar.bz2
deleted file mode 100644
index eedfe75..0000000
--- a/siril-0.99.10.1.tar.bz2
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:8364af3c767680c6e4e868903d72d023b3cf47a6eb5274c6d3607348102f36aa
-size 2671449
diff --git a/siril-1.0.0~rc1.tar.bz2 b/siril-1.0.0~rc1.tar.bz2
new file mode 100644
index 0000000..6d99096
--- /dev/null
+++ b/siril-1.0.0~rc1.tar.bz2
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a201b9505c048818e23034a0b5451787cc6c43601fca2776fa4c3f7610e93fe7
+size 2731859
diff --git a/siril.changes b/siril.changes
index 847f1ed..c6863af 100644
--- a/siril.changes
+++ b/siril.changes
@@ -1,3 +1,28 @@
+-------------------------------------------------------------------
+Mon Nov 22 08:32:59 UTC 2021 - Paolo Stivanin <info@paolostivanin.com>
+
+- Update to 1.0.0-rc1:
+  * This new version makes it possible to attempt an astrometric
+    resolution on only part of the image.
+    Still for wide field images (FOV > 5°), the astrometric
+    resolution is now done by default on the central part
+    of the image only.
+  * Keeping WCS information in geometric operations
+  * Keeping WCS information in Undo/Redo
+  * Better annotation
+  * Add of GAIA EDR3 catalogue
+  * Improve star detection in image registration
+  * For global registration, it is now possible to choose the number
+    of degrees of freedom of the transformation that sends the image
+    to be registered to the reference image. By default, the
+    transformation is a homography, which admits a certain number
+    of distortions between the 2 images.
+  * New tool: Evaluate sensor tilt
+  * New button for quick photometry
+  * Pixel Math : implementation of a first version
+  * Refactoring of command help
+- For more details, see https://siril.org/download/2021-11-20-siril-1.0.0-rc1
+
 -------------------------------------------------------------------
 Fri Nov 12 06:39:17 UTC 2021 - Paolo Stivanin <info@paolostivanin.com>
 
diff --git a/siril.spec b/siril.spec
index c8e1ce6..e85ed87 100644
--- a/siril.spec
+++ b/siril.spec
@@ -16,25 +16,27 @@
 #
 
 
+%define rcver_upstream     1.0.0-rc1
+
 Name:           siril
-Version:        0.99.10.1
+Version:        1.0.0~rc1
 Release:        0
 Summary:        An astronomical image processing software for Linux. (IRIS clone)
 License:        BSL-1.0 AND GPL-3.0-or-later
 Group:          Productivity/Scientific/Physics
 URL:            https://www.siril.org/
-Source:         https://gitlab.com/free-astro/siril/-/archive/%{version}/siril-%{version}.tar.bz2
+Source:         https://gitlab.com/free-astro/siril/-/archive/%{rcver_upstream}/siril-%{rcver_upstream}.tar.bz2#/%{name}-%{version}.tar.bz2
 BuildRequires:  fdupes
 BuildRequires:  gcc-c++
-BuildRequires:  meson
+BuildRequires:  meson >= 0.53.0
 BuildRequires:  pkgconfig
 BuildRequires:  pkgconfig(cfitsio)
-BuildRequires:  pkgconfig(exiv2)
+BuildRequires:  pkgconfig(exiv2) >= 0.25
 BuildRequires:  pkgconfig(ffms2)
 BuildRequires:  pkgconfig(fftw3)
 BuildRequires:  pkgconfig(gsl)
-BuildRequires:  pkgconfig(gtk+-3.0) >= 3.17.0
-BuildRequires:  pkgconfig(json-glib-1.0)
+BuildRequires:  pkgconfig(gtk+-3.0) >= 3.20.0
+BuildRequires:  pkgconfig(json-glib-1.0) >= 1.2.6
 BuildRequires:  pkgconfig(libavcodec)
 BuildRequires:  pkgconfig(libavformat)
 BuildRequires:  pkgconfig(libavutil) >= 55.20
@@ -46,14 +48,10 @@ BuildRequires:  pkgconfig(libraw)
 BuildRequires:  pkgconfig(libswresample)
 BuildRequires:  pkgconfig(libswscale)
 BuildRequires:  pkgconfig(libtiff-4)
+BuildRequires:  pkgconfig(opencv4) >= 4.4.0
 BuildRequires:  pkgconfig(rtprocess)
 BuildRequires:  pkgconfig(shared-mime-info)
 BuildRequires:  pkgconfig(wcslib)
-%if 0%{?suse_version} < 1550
-BuildRequires:  pkgconfig(opencv)
-%else
-BuildRequires:  pkgconfig(opencv4)
-%endif
 
 %description
 Siril is meant to be Iris for Linux (sirI-L). It is an astronomical image
@@ -61,7 +59,7 @@ processing tool, able to convert, pre-process images, help aligning them
 automatically or manually, stack them and enhance final images.
 
 %prep
-%setup -q
+%setup -q -n %{name}-%{rcver_upstream}
 
 %build
 # override build directory, the default "build" is a regular source directory